If the scientist repeats the experiment using lower concentrations of lead than those she used initially, she can draw several conclusions based on the results of the experiment.
If she finds that the results are similar or the same as her initial experiment, she can conclude that the effect observed in her initial experiment is likely due to the lead and not a result of chance. This would provide support for her hypothesis that lead is responsible for the observed effect. Additionally, this could also indicate that the effect is likely to be present at a wide range of lead concentrations, and not just at the higher concentrations used in the initial experiment. If the results are different, however, she may conclude that the effect is dependent on the concentration of lead and that lower concentrations have a weaker effect. For example, she may have used different methods for preparing the lead solutions in the repeat experiment which could have led to variations in the final concentrations.
Learn more about lead properties here :
https://brainly.com/question/17109514
#SPJ4
when determining a compounds empirical formula if your calculated mole amounts are not equal to whole numbers what
When determining a compound's empirical formula, if your calculated mole amounts are not equal to whole numbers, you must round up or down.
There are a few techniques you can employ to deal with decimal mole ratios between the atoms that make up your compound when you have to determine the empirical formula of the compound from its percent composition.
I won't walk you through the entire process because I'm going to presume you know how to get here. Let's say you have a compound including the elements A, B, and C, and you determine their mole ratios to be
A:2.33
B:1
C:1.67
Using mixed fractions in these circumstances is quite beneficial. A whole number and a regular (or appropriate) fraction are combined to form mixed fractions.
2.33= 2 1/3, or 7/3,
while 1.67 = 1 2/3. This makes the ratios equal to
A:7/3
B:1
C:5/3
Now multiply all of them by 3 to get rid of the denominator and you'll get the empirical formula
A₇B₃C₅
Your question is incomplete but most probably your full question was
When determining a compounds empirical formula if your calculated mole amounts are not equal to whole numbers what must you do?
Learn more about empirical formula at https://brainly.com/question/30137085
#SPJ4
chemistry?
what is it?
Why do we use it?
explain in 3-5 sentences each question.
Answer: Chemistry, like physics and biology, is a natural science. In fact, there is considerable overlap between chemistry and these other disciplines. Chemistry is a science that studies matter. This includes atoms, compounds, chemical reactions, and chemical bonds.
Explanation: Chemistry is the scientific study of the properties and behavior of matter. It is a natural science that covers the elements that make up matter to the compounds made of atoms, molecules, and ions: their composition, structure, properties, behavior, and the changes they undergo during a reaction with other substances.
suppose your original tea happened to be a 10% solution of sucrose, and your pot contained 500 ml of tea. you diluted it with 200 ml of water. you now have 700 ml of tea. but what is the new concentration?
The new concentration of sucrose in the tea is 7.14%.
When a solution is diluted, the number of moles of solute (in this case, sucrose) remains constant, while the number of liters of solvent (in this case, water) increases. Therefore, the concentration of the solute decreases.
To calculate the new concentration, you would divide the number of moles of sucrose by the number of liters of the final solution (700 ml). In this case, the original solution was a 10% solution of sucrose, so it contained:
10/100 × 500 = 50 grams of sucrose.
After dilution with 200 ml of water, the new solution contains:
50/700 × 100% = 7.14%.
Therefore the new concentration is 7.14%
To learn more about sucrose visit: https://brainly.com/question/30313287
#SPJ4
true or false: in the context of depressant drugs, chloral hydrate is rapidly metabolized to formaldehyde, which is the active hypnotic agent.true false question.truefalse
Chloral hydrate is used as a hypnotic agent. It is metabolized in liver to form trichloroethanol and trichloroacetic acid.. So it is false that chloral hydrate is metabolized as formaldehyde.
Chloral hydrate is readily absorbed after oral administration and metabolized by alcohol dehydrogenase enzyme in liver. It is metabolized as trichloroethanol and trichloroacetic acid. Trichloroethanol is the metabolite which results in all the pharmacological activity. Which is further metabolized as Trichloroethanol glucoronide and dichloroacetic acid.
Formaldehyde is toxic substance and it is metabolized in liver which has no association with chloral hydrate.
So it is false that chloral hydrate is metabolized to formaldehyde.
For further details regarding Chloral hydrate, kindly refer
https://brainly.com/question/28299451
#SPJ4
Find the similarities, differences, and relationships between coefficients and subscript. (At least 2 of each)
The subscripts are a part of the formulations and once the formulas for the reactants and products have been established, they cannot be changed.
What is the difference between coefficients and subscript?The subscripts are a component of the formulas, and they cannot be modified after the formulas for the reactants and products have been established. The number of each material participating in the reaction is indicated by the coefficients, which can be modified to make the equation more or less balanced.
Although both coefficient and subscript are numerical terms, they provide different information on a particular chemical reaction. Coefficient indicates the number of moles of a material, whereas subscript gives the number of atoms in a molecule, and this is the main distinction between coefficient and subscript.
A smaller-than-usual number, figure, symbol, or indicator that is placed either slightly above (superscript) or below (subscript) the standard line of type is referred to as a superscript or subscript (subscript).
To learn more about coefficients and subscript refer to:
https://brainly.com/question/14425756
#SPJ1
this experiment tests how the temperature of water affects the time it takes for antacid tablets to dissolve. 1. what is the independent variable? 2. what is the dependent variable? materials
The independent variable in this experiment is the temperature of the water. The dependent variable in this experiment is the time it takes for the antacid tablets to dissolve.
The independent variable in this experiment is the temperature of the water. This is the variable that is being manipulated and changed in order to observe its effect on the dependent variable. The dependent variable in this experiment is the time it takes for the antacid tablets to dissolve. This is the variable that is being measured and observed in relation to the independent variable. The change in the independent variable (temperature of the water) will result in a change in the dependent variable (time for the antacid tablets to dissolve).
learn more about antacid tablets here:
brainly.com/question/13803795
#SPJ4
Look at the symbol equation below. Which is the missing product? mgco3+2hcl-->___+h2o+co2
MgCO₃ + 2HCl ⇒ MgCl₂ + H₂O + CO₂ is the balanced chemical equation. Therefore, the missing product is MgCl₂.
What is balanced chemical equation ?The term balanced chemical equation is defined as a chemical equation in which mass is conserved and there are the same numbers of atoms of each element on both sides of the equation.
The chemical equation must be balanced in order to obey the law of conservation of mass. When the number of different atoms of elements in the reactants side equals the number of atoms in the products side, the chemical equation is balanced.
Thus, MgCO₃ + 2HCl ⇒ MgCl₂ + H₂O + CO₂ is the balanced chemical equation. Therefore, the missing product is MgCl₂.
To learn more about the balanced chemical equation, follow the link;
https://brainly.com/question/28294176
#SPJ1
Which of the following accurately describes activation energy
Answer:
Option A
Explanation:
Activation energy is defined as the minimum amount of extra energy required by a reacting molecule to get converted into product. It can also be described as the minimum amount of energy needed to activate or energize molecules or atoms so that they can undergo a chemical reaction or transformation.
Answer: A. The minimum amount of energy required for a reaction to happen
Explanation:
Activation energy is defined as the minimum amount of extra energy required by a reacting molecule to get converted into product. It can also be described as the minimum amount of energy needed to activate or energize molecules or atoms so that they can undergo a chemical reaction or transformation.
Metamorphic rocks are made on the Earth's surface. true or false?
Metamorphic rocks are made on the Earth's surface. This statement is true.
Why are metamorphic rocks generally not found at the Earth's surface?The majority of mountain ranges on Earth are composed primarily of metamorphic rock. However, metamorphic rocks form deep within the Earth when intense heat and pressure force existing rocks to change their crystalline structure, resulting in the formation of a new type of rock.
Although metamorphic rocks form deep within the Earth's crust, they are frequently exposed on the planet's surface.
Thus, Metamorphic rocks are made on the Earth's surface. This statement is true.
To learn more about the metamorphic rocks, follow the link;
https://brainly.com/question/19930528
#SPJ1
the most probable distribution of particles is the one with the group of answer choices highest enthalpy. lowest number of possible microstates. most symmetry. highest energy. largest number of possible microstates.
Option ( v) is correct. The most probable distribution of particles is the one with the largest number of possible microstates.
In an isolated system the entropy of the system is increased to its maximum value. A microstate is a specific way that can arrange the energy of the system. The more microstates the higher the entropy. The greater the number of microstates the greater the entropy. According to Boltzmann it is difficult to explain the behavior of microstates. In order to get the actual probabilities of a given microstate it is needed to figure out the probability for an individual microstate. A microstate is defined as a specific microscopic configuration of a thermodynamic system that the system may occupy with a certain probability in the course of its thermal fluctuations.
To learn more about Microstates please visit:
https://brainly.com/question/16693606
#SPJ4
The complete question is,
The most probable distribution of particles is the one with the group of answer choices:
(i) highest enthalpy.
(ii) lowest number of possible microstates.
(iii) most symmetry.
(iv)highest energy.
(v) largest number of possible microstates.
the most probable distribution of particles is the one with the group of largest number of possible microstates.
A microstate, also known as a ministate, is a sovereign state that often has a very tiny land area as well as a very small population. The terms "state" and "very small," however, are not clearly defined under international law.
The system's entropy rises to its highest level in an isolated system. A microstate is a particular configuration that the system's energy can take. The entropy increases with the number of microstates. The entropy increases with the number of microstates. Boltzmann claims that it is challenging to comprehend the behaviour of microstates. It is necessary to calculate the probability for each individual microstate in order to obtain the real probabilities for a certain microstate. A thermodynamic system may, with a certain probability, occupy a certain microscopic configuration called a microstate during its thermal fluctuations.
For more such questions on microstate, Visit:
brainly.com/question/16693606
#SPJ4
consider chlorine, which occurs as a mixture of two isotopes: chlorine-35, with a natural abundance of 75.8% and an exact mass of 34.97 amu and chlorine-37, with a natural abundance of 24.2% and an exact mass of 36.97 amu. what is the average atomic mass of chlorine? report to two decimal places.
If the natural abundance of chlorine-35 is 75.8% and that of chlorine-37 is 24.2%, then the average atomic mass of chlorine will be 35.44 amu.
Chlorine exists in two isomeric forms which are the chlorine-35 and chlorine-37. The atomic mass of the chlorine elements is basically the average atomic mass of its isotopes depending upon their abundance in nature.
The atomic mass of chlorine-35 is 34.97amu and a natural abundance equal to 75.8 %. The atomic mass of chlorine-37 is equal to 36.97 amu with an abundance of 24.2%.
To calculate the average atomic mass of chlorine,
The abundance of chlorine-35 = 75.8% = 0.758
The abundance of chlorine-37 = 24.2% = 0.242
⇒ Average atomic mass = 34.97 × 0.758 + 36.97 × 0.242
⇒ Average atomic mass = 26.50 + 8.94
⇒ Average atomic mass = 35.44 amu
To know more about chlorine here
https://brainly.com/question/11008051
#SPJ4
a sample of methane (ch4) gas contains a small amount of helium. calculate the volume percentage of helium if the density of the sample is 0.70902 g/l at 0.08c and 1.000 atm.
The volume percentage of helium in the sample is 25.06%.
For the volume percentage of helium in the sample of methane gas, we will first need to determine the density of the helium and the density of the methane.
We know that the density of the sample is 0.70902 g/L at 0.08 °C and 1.000 atm and that the sample contains methane (CH4) and helium (He).
The density of methane at 0.08°C and 1.000 atm is 0.717 g/L and the density of Helium is 0.178 g/L at the same temperature and pressure.
To find the volume percentage of helium in the sample, we can use the formula:
% Volume of helium = [tex](\frac{density of helium}{density of sample})[/tex] × 100%
% Volume of helium = [tex](\frac{0.178}{0.70902} )[/tex] × 100%
% Volume of helium = 25.06%
So, the volume percentage of helium in the sample is 25.06%.
To know more about Density,
https://brainly.com/question/1354972
#SPJ4
what is the rate of diffusion for ammonia
In comparison to hydrogen chloride, ammonia diffuses 1.46 times more quickly.
Is the diffusion of ammonia quick?Since hydrogen chloride has a higher molecular weight than ammonia, the hydrogen chloride will diffuse more slowly and cover a longer distance inside the tube.In comparison to hydrogen chloride, ammonia diffuses 1.46 times more quickly.NH3 diffuses at a faster rate because it has a smaller molecular mass than the other gases mentioned. Graham's law of gas diffusion states that this is the case.To get the diffusion rate of a certain gas, divide the diffusion rate of the original gas by the square root of the molar mass of gas 2, then divide that by the molar mass of gas 1.To learn more about ammonia diffuses refer to:
https://brainly.com/question/10401051
#SPJ1
Imagine you are a scientist employed by a manufacturer of cookware like pots and pans. Which of the materials in the table would you use for a ceramic baking dish, and why?
Answer:
As a scientist employed by a manufacturer of cookware, I would recommend using alumina (Al2O3) as the material for a ceramic baking dish.
A colorless liquid was added to anhydrous copper {ii} sulphate which turned blue.Why is it wrong to conclude the liquid is pure water?
The conclusion the student that the colorless liquid that was added to anhydrous copper {ii} sulfate which turned blue is pure water because anhydrous copper {ii} sulfate does not react with pure water.
What are the reaction of water and anhydrous copper {ii} sulfate?
A sample of anhydrous copper(II) sulfate becomes blue when water is present.
In the absence of water, it is also known as anhydrous copper(II) sulfate and is colorless.
When water molecules are added to anhydrous copper {ii} sulfate, the individual water molecules are held within the ionic lattice surrounding the copper(II) ions, it is still a dry solid resulting in the formation of blue hydrated copper {ii} sulfate.
This reaction does not occur with pure water.
Learn more about anhydrous copper {ii} sulfate at: https://brainly.com/question/24555008
#SPJ1
a. rate of condensing > rate of bubbling b. rate of dissolution < rate of deposition c. rate of dissolution > rate of deposition d. rate of bubbling > rate of dissolving e. rate of dissolution
Dynamic equilibrium can be defined as rate of dissolution = rate of deposition. So, option D is correct.
Once a reversible reaction takes place in chemistry, a dynamic equilibrium is present. There is no net change because substances transition equally between reactants and products. The rate at which reactants and products form ensures that neither of their concentrations change. It is an example of a system that is in a constant state specifically.
An equation's equilibrium can be altered and pulled out of dynamic equilibrium by altering the temperature, pressure, or concentration of a reaction. This is the reason why if you open a Coke can and leave it outside for a while, it will ultimately turn "flat" and no longer have any bubbles. This is due to the fact that the soda can is no longer a closed system and the carbon dioxide is now free to interact with the environment. This throws it out of dynamic equilibrium and lets out carbon dioxide gas until there are no bubbles left.
To know more about Dynamic equilibrium
brainly.com/question/26034510
#SPJ4
The complete question is:
Dynamic equilibrium can be defined as:
A) rate of bubbling > rate of dissolving
B) rate of dissolution > rate of deposition
C) rate of dissolution < rate of deposition
D) rate of dissolution = rate of deposition
a chemist carefully measures the amount of heat needed to raise the temperature of a 1.71 kg sample of a pure substance from 0.5 degrees celsius to 15/9 degrees celsius. the experiment shows that 3.66 kj of heat are needed. what can the chemist report for the specific heat capacity of the substance? round your answer to 3 significant digits.
The experiment shows that 3.66 kJ of heat are needed. 0.249 J/g°C or 249 J/kg°C, can the chemist report for the specific heat capacity of the substance.
The specific heat capacity of a substance is the amount of heat required to raise the temperature of a given mass of the substance by a certain amount. It is usually denoted by the symbol "c" and is measured in units of J/g°C or J/kg°C.
To calculate the specific heat capacity of the substance in this case, we can use the following formula:
c = Q / (m x ΔT)
where Q is the heat absorbed (or released) by the substance, m is the mass of the substance, and ΔT is the change in temperature.
In this case, the mass of the substance is 1.71 kg, the change in temperature is (15/9 - 0.5)°C = 14.6°C, and the heat absorbed is 3.66 kJ.
c = 3.66 kJ / (1.71 kg x 14.6°C)
= 0.249 J/g°C or 249 J/kg°C
Therefore, the chemist can report that the specific heat capacity of the substance is 0.249 J/g°C or 249 J/kg°C, rounded to 3 significant digits.
To know more about specific heat please refer: https://brainly.com/question/11297584
#SPJ4
1. What does the process of fracking release from the layers of Earth?
2. What does fracking use to release this limited substance?
3. How long has the process of fracking been used?
4. Why has there been a fracking “boom” in the United States in the past ten years?
5. What risks does fracking pose to our drinking water resources?
6. Do you think the cost (risk) of fracking is worth the benefit? Explain.
Pleaseeee someone help me!
In addition to altering the landform due to weathering, slope processes, and mass movement, fracking causes major lithosphere fissures.
What is fracking?A pressurised liquid is used in fracking, a well stimulation technique, to fracture bedrock strata.
Methane, an extremely powerful greenhouse gas, is released in massive quantities during fracking.
Since 1947, fracking has been carried out safely in the US. Fracking has been used to complete more than 1.7 million U.S. wells, yielding 600 trillion cubic feet of natural gas and more than seven billion barrels of oil.
However, the present fracking boom wasn't really ignited until two significant shifts occurred at the start of the twenty-first century.
Because the fracking fluid that is poured into rock to release gas frequently contains chemicals, improper fracking can damage water supplies.
Fracking has advantages since it boosts income, employment, economic activity, and house prices.
Thus, these are the risks fracking pose to our drinking water resources.
For more details regarding fracking, visit:
https://brainly.com/question/25062302
#SPJ1
indicate whether or not each of the structures is considered to be aromatic. compound a is a 3 carbon ring with a double bond between carbons 1 and 2. carbon 3 has a lone pair and a negative charge and is bonded to one hydrogen. compound b is a 5 carbon ring with two double bonds. the non alkene carbon has a carbocation. which is true?
Neither Compound A nor Compound B is aromatic.
The statement "compound A is a 3 carbon ring with a double bond between carbons 1 and 2. carbon 3 has a lone pair and a negative charge and is bonded to one hydrogen" and "compound b is a 5 carbon ring with two double bonds. the non-alkene carbon has a carbocation" is true.
Compound A is not considered to be aromatic because it does not meet the criteria for aromatic compounds. Aromatic compounds have a specific type of cyclic and fully conjugated system of electrons which allows them to have delocalized pi electrons and a cyclic ring of alternating single and double bonds. Compound A has a three-carbon ring with a double bond between carbons 1 and 2, but the third carbon has a lone pair and a negative charge, which breaks the conjugation of the ring.
It also lacks the cyclic ring of alternating single and double bonds, which is a requirement for aromaticity.
Compound B is not considered to be aromatic because it does not meet the criteria for aromatic compounds. Aromatic compounds have a cyclic ring of alternating single and double bonds. Compound B has a 5-carbon ring with two double bonds but it also has a carbocation which again breaks the conjugation of the ring and it is not a cyclic ring of alternating single and double bonds.
Read more about Organic chemistry:
https://brainly.com/question/704297
#SPJ4
List at least 3 physical properties if water.
Answer:
Appearance: Water is a colourless, odourless and tasteless liquid in its natural state. The crystal structure of water is hexagonal.
Density: The density of water is about 1 gm/cc and it varies with temperature in an undefined pattern. In solid state, the density remains close to 0.9gm/cc.
Viscosity: Viscosity is explained by the resistance to deformation at a given rate. In other words, the thickness of the liquid - eg, syrup or water. Viscosity of water is 0.89 cP.
Explanation:
Two electrons grouped together on an electron shell are called...
A. electron sets.
B. electron pairs.
C. Valence electrons
a group electrons is called electon pair.
Answer:
B. electron pairs.
Explanation:
thproium-232 is a radioactive isotipe of throium. how many neytrosna re located in the nucleus of theorum 232
142 neutrons are in the nucleus of theorem-232, which is a radioactive isotope of thorium.
The number of neutrons located in the nucleus of thorium-232 can be calculated using its atomic mass and atomic number. The atomic mass of thorium-232 is 232 and the atomic number is 90. The atomic number represents the number of protons in the nucleus, and since protons and neutrons have the same mass, we can calculate the number of neutrons by subtracting the atomic number from the atomic mass.
232 - 90 = 142
So, there are 142 neutrons located in the nucleus of thorium-232.
You can learn more about thorium-232 at
https://brainly.com/question/11228570
#SPJ4
volume displacement is used to determine the volume of an irregularly shaped metal sample. the gradauted cylinder initially contains 23.6 ml of water. after the metal sample is added to the graduated cylinder, the volume is 29.8 ml . what is the volume of the metal sample?
The volume of the metal sample is 6.2 ml
The theory behind this is that the volume of the metal is what causes the increase in water volume in the cylinder.
This means that by comparing the volume occupied by the water and metal together and the amount occupied by the water alone in the cylinder, you can determine the volume of the metal.
To be more specific, the volume of the metal will be,
Vmetal= Vwater + metal - Vwater
In this case, we have
Vwater = 23.6 ml
Vwater + metal = 29.8 ml
So,
Vmetal = 29.8 ml - 23.6 ml = 6.2 ml
Thus the volume of the metal sample is 6.2 ml.
To learn more about volume displacement visit,
https://brainly.com/question/17322215
#SPJ4
How do matter and energy move in and out of the atmosphere? How do changes in one area of the atmosphere affect other areas? The planet as a whole?
Matter and energy move in and out of the atmosphere through several processes.
How do matter and energy move in and out of the atmosphere?These include evaporation, precipitation, condensation, convection, and advection. Evaporation is the process by which liquid water turns into vapor and is released into the atmosphere.Precipitation is the process by which water droplets form in the atmosphere and then fall as rain, snow, hail, or other forms of precipitation.Condensation is the opposite of evaporation in which water vapor in the atmosphere condenses into liquid droplets. Convection is the transfer of heat energy through the movement of air and water molecules. Advection is the transfer of heat energy through the movement of air masses.Changes in one area of the atmosphere can affect other areas in a variety of ways. For example, if there is an increase in temperature in one area, this can lead to an increase in convection, which can cause air masses to move from one area to another, potentially bringing in warm air from other parts of the planet.This can, in turn, affect the temperature and weather patterns in other areas. Similarly, changes in precipitation, such as an increase in rain or snowfall, can lead to changes in the amount of water vapor in the atmosphere, which can affect weather patterns in other areas. These changes can also have global effects, such as increasing sea levels or changing global wind patterns.To learn more about matter and energy move in and out of the atmosphere refer to:
https://brainly.com/question/11762179
#SPJ1
what is chemistry and reasons for studying chemistry
The study of basic properties and behavior of matter is known as chemistry. It is a branch of natural science that studies everything from the atoms, molecules, and ions that make up a compound to the elements that make up matter:their composition,structure,characteristics, behavior, and what happpens when they interact.
Cooking is essentially a chemistry experiment. It's likely that you'll become a better cook if you comprehend the chemical processes involved in raising baked items, neutralizing acidity, or thickening sauces. Information on petroleum, product recalls, pollution, the environment, and technological advancements.
Your understanding of the world around you is aided by chemistry. Environmental contamination is without a doubt a major issue on a global scale. But how does it impact Earthly life? Basic chemical knowledge is necessary to comprehend how environmental contamination affects both living things and the atmosphere.
Learn more about chemistry here:
https://brainly.com/question/1222323
How many grams of sodium fluoride
(NaF) are dissolved in 3. 75 L of a
1. 55 M solution?
Molar Mass Na: 22. 99 g/mol
Molar Mass E: 19. 00 g/mol
164.22 grams of sodium fluoride are dissolved in 3.75 L of a 1.55 M solution.
To find the number of grams of sodium fluoride (NaF) dissolved in 3.75 L of a 1.55 M solution, you can use the formula:
molarity (M) x volume (L) x molar mass (g/mol) = mass (g)
Sodium fluoride (NaF) has the following molar mass:
22.99 g/mol (Na) + 19.00 g/mol (F) = 41.99 g/mol
So the mass of sodium fluoride dissolved in 3.75 L of a 1.55 M solution is:
mass (g) = 1.55 M x 3.75 L x 41.99 g/mol = 164.22 g
Therefore, 164.22 grams of sodium fluoride are dissolved in 3.75 L of a 1.55 M solution.
Learn more about molar mass here:
https://brainly.com/question/22997914
#SPJ4
25.00 cm³ of the hydrochloric acid reacted with 23.50 cm³ of the 0.100 mol/dm³
barium hydroxide solution.
The equation for the reaction is:
2 HCl(aq) + Ba(OH)2(aq) → BaCl₂(aq) + 2H₂O(1)
Calculate the concentration of the hydrochloric acid in mol/dm³.
Please help!!
Answer:
0.111 moldm⁻³
First work out the moles of NaOH dispensed from the burette:
1. (25.0/1000)x0.100 = 0.00250 moles of HCl
Next use the balanced equation to reason how many moles of HCl are present in the flask:
2. 1:1 therefore 0.00250 moles NaOH
Lastly, now that you have both the volume and the number of moles of HCl, work out its concentration.
3. 0.0025/(22.5/1000) = 0.111 moldm⁻³
Explanation:
Answer:
The concentration of the hydrochloric acid is 0.00047 mol/dm³.
Explanation:
The balanced equation for the reaction is:
2 HCl(aq) + Ba(OH)2(aq) → BaCl₂(aq) + 2H₂O
We know that 25.00 cm³ of the hydrochloric acid reacted with 23.50 cm³ of the 0.100 mol/dm³ barium hydroxide solution.
Given the balanced equation, it is clear that 2 moles of hydrochloric acid react with 1 mole of barium hydroxide. As we know the volume and concentration of the barium hydroxide, we can calculate the number of moles of barium hydroxide present in the 23.50 cm³ of solution.
23.50 cm³ of 0.100 mol/dm³ barium hydroxide = (23.50 x 0.100) / 1000 = 0.00235 moles
As 2 moles of hydrochloric acid react with 1 mole of barium hydroxide, and we know the number of moles of barium hydroxide, we can calculate the number of moles of hydrochloric acid.
0.00235 moles of barium hydroxide / 2 = 0.001175 moles hydrochloric acid
We have the number of moles of hydrochloric acid, we can calculate the concentration in mol/dm³.
0.001175 moles hydrochloric acid / 25.00 cm³ = 0.00047 mol/dm³
The concentration of the hydrochloric acid is 0.00047 mol/dm³.
A gas occupies a volume of 14. 5 L at 230 K. What will the temperature be it the gas
expands to 21. 8 L?
345. 8 K
1. 37 K
O 17. 4 K
1530K
A gas occupies a volume of 14. 5 L at 230 K. Option (C), 17.4 K will the temperature be it the gas expands to 21.8 L.
The relationship between the temperature, volume, and pressure of a gas is described by the ideal gas law, PV = nRT, where P is the pressure, V is the volume. We are given the initial volume and temperature of the gas and we are asked to find the final temperature when the gas expands to a different volume. The ideal gas law is an equation of state of a gas, which describes the relationship between the pressure, volume, and temperature of a gas. We are given V1, T1, and V2. The number of moles and pressure are not given so we can consider them constants.
The equation is :
V1/T1 = V2/T2
T2 = T1(V1/V2)
T2 = 230 K (14.5L / 21.8L) = 17.4 K
So the temperature will be 17.4 K if the gas expands to 21.8L.
Therefore, the correct answer is 17.4 K (Option C).
To know more about gas please refer: https://brainly.com/question/13123721
#SPJ4
A container holds a mixture of gases. Gas A has a partial pressure
of 453. 9 mmHg. Gas B has a partial pressure of 287. 6 mmHg. Gas
C has a partial pressure of 382. 4 mmHg. What is the total
pressure of the gases inside the container?
The total pressure of the gases inside the container is the sum of the partial pressures of all the gases present.
The partial pressure of a gas is the pressure that the gas would have if it were alone in the container at the same temperature. In this case, the container holds three gases: Gas A, Gas B, and Gas C. The partial pressures of Gas A, Gas B, and Gas C are given as 453.9 mmHg, 287.6 mmHg, and 382.4 mmHg, respectively. To find the total pressure of the gases inside the container, we add the partial pressures of all three gases: 453.9 mmHg + 287.6 mmHg + 382.4 mmHg = 1123.9 mmHg. Therefore, the total pressure of the gases inside the container is 1123.9 mmHg.
To know more about pressure click here:
https://brainly.com/question/12971272#
#SPJ4
Calculate the mass in grams of each sample.
3. 4. 62 mol of (NH4)2SO3
Molar mass of (NH4)2SO3 is 116.14 g/mol.(NH4)2SO3 is ammonium sulfite.mass of (NH4)2SO3 is 535.92g
Ammonia and sulphur dioxide in an aqueous solution can react to form ammonium sulfite:
2 NH3 + SO2 + H2O → (NH4)2SO3
mass=no.of moles*molecular weight
molar mass of (NH4)2SO3 =116.14 g/mol
mass=4.62*116
mass=535.92g
Gas scrubbers made of ammonium hydroxide, which are now antiquated, create ammonium sulfite to remove sulphur dioxide from power plant emissions. The Walther Process' foundation is the conversion. Ammonium sulphate can be produced by air oxidising the resultant ammonium sulfite.Sulfite of ammonium is a reducing agent. As it heats up and begins to decompose, it releases sulphur dioxide and nitrogen oxides.
learn more about ammonium sulfite Refer:brainly.com/question/14535501
#SPJ4