Answer:
A
Explanation:
The intermolecular force which polar molecules take part in are dipole-dipole forces.
At a certain temperature and pressure, 1 L of CO2 gas weighs 1.55 g. What is the mass of 1 L of N2 gas at the same temperature and pressure
Answer:Set up a proportion os V1/n1 = V2/n2. V is the volume, n is the amount in MOLES, not grams. Convert the CO_2 to moles, then solve and find that the amount of N_2 should be the same amount of moles. Then use the molar mass of N_2 (28.02 grams/mole) to convert that amount of moles into grams. That's your answer.
Explanation:
Calculate the pH for the following solutions and indicate whether each solution is acidic or basic.
[OH-] = 1.0 × 10-2M pH = __________ Acid/Base
Answer:6=base
Explanation:
How many atoms are present in h3po4
Answer:
3
Explanation:
The molar mass is obtained by adding up the average atomic masses of these atoms: Molar mass H3PO4 = 3(1.008 g) + 1(30.97 g) + 4(16.00 g) = 97.99 g.
The chemical equation below shows the burning of magnesium (mg) with oxygen (o2) to form magnesium oxide (mgo). 2mg o2 right arrow. 2mgo the molar mass of o2 is 32.0 g/mol. what mass, in grams, of o2 is required to react completely with 4.00 mol of mg? 2.00 grams 64.0 grams 128 grams 256 grams
Explanation:
64 grams of O_2O2 will be required to react completely with 4 moles of Mg.
As per the balanced chemical equation 2 moles or 48 g of Mg reacts with one mole or 32 g of oxygen. Hence, 4 moles of Mg requires 2 moles or 64 grams of oxygen gas.
What is magnesium oxide ?Magnesium oxide (MgO) is a white solid mineral that occurs naturally as the mineral periclase. It is one of the most common and important magnesium compounds, and is widely used in many industrial and commercial applications.
The balanced chemical equation of the reaction between Mg and oxygen is given as follows:
2 Mg + O₂ ⇒ 2 MgO
As per the balanced chemical equation 2 moles or 48 g of Mg reacts with one mole or 32 g of oxygen. Hence, 4 moles of Mg requires 2 moles or 64 grams of oxygen gas.
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Using the bond energy values in the previous question, which molecule
releases the most energy when forming its bonds? *
H2
Cl2
Br2
bond energies:
H-H 432
CI - CI 239
Br-Br 193
i cant tell if its h2 or br2 because im not sure what the question is asking
Hydrogen molecule is a molecule that releases the most energy when forming its bonds as compared to other molecules.
What bond needs more energy?We know that H-H bond energy is 432 kJ mol-1, CI - CI bond energy is 239kJ mol-1 and Br-Br bond energy is 193 kJ mol-1 so from this data we can conclude that more energy is required to break the bond between hydrogen atom.
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Which has greater kinetic energy, a car going 30 mph or one going 40 mph energy?
Which stimulus is an example of an internal stimulus?
A. an artificial light that attracts insects
B. an increase in the amount of water available to a plant
C. a decrease in oxygen levels in the blood during exercise
D. a sudden change of air temperature
An example of an external stimulus is a decrease in oxygen levels in the blood during exercise.
Option C
What is stimulus?A stimulus is defined as a thing or sensation that causes a specific reaction in an organ or tissue of a living organism
There are two types of stimuli:
Internal stimulusExternal stimulusLearn more about stimulus:
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Answer:
An example of an external stimulus is a decrease in oxygen levels in the blood during exercise.
Option C
What is stimulus?
A stimulus is defined as a thing or sensation that causes a specific reaction in an organ or tissue of a living organism
There are two types of stimuli:
Internal stimulus
External stimulus
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Explanation:
2. How many grams of water would be produced if 20.0 liters of oxygen were burned at a temperature of
-10.0"C and a pressure of 1.3 atm?
The mass of water H₂O that would be produced from the reaction is 43.2 g
How to determine the mole of oxygen Volume (V) = 20 LTemperature (T) = –10 ˚C = –10 + 273 = 263 KPressure (P) = 1.3 atmGas constant (R) = 0.0821 atm.L/Kmol Number of mole (n) =?
The number of mole can be obtained as by using the ideal gas equation as illustrated below:
n = PV / RT
n = (1.3 × 20) / (0.0821 × 263)
n = 1.2 mole
How to determine mole of waterBalanced equation
2H₂ + O₂ → 2H₂O
From the balanced equation above,
1 mole of O₂ reacted to produce 2 moles of H₂O.
Therefore,
1.2 mole of O₂ will react to produce = 1.2 × 2 = 2.4 moles of H₂O
How to determine the mass of water produced Mole of H₂O = 2.4 moles Molar mass of H₂O = (2×1) + 16 = 18 g/mol Mass of H₂O =?Mass = mole × molar mass
Mass of H₂O = 2.4 × 18
Mass of H₂O = 43.2 g
Thus, 43.2 g of water were produced from the reaction.
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Answer:
15.6g ofH2O
Explanation:
Gases that are abundantly emitted by volcanoes include ________. Group of answer choices helium carbon dioxide water vapor sulfur dioxide or hydrogen sulfide
Answer:
Water vapour (more than 60%)
Common observations of a chemical reaction are described in the Introduction section. For each observation, name a common or everyday occurrence that must involve a chemical reaction.
Look at pic, need it asap!
Answer:
12x+4x-7y+45b+78a-44b+1a+1z+0d+1.1a+1.1a
A chemist makes a solution of naoh for use in an experiment. she dissolves 0.00500 mol naoh in 1.00 l h2o. the naoh completely dissociates to form a solution with [oh− ] = 0.00500 m. what is the poh of this solution? 0.00500 5.00 2.30 –2.30
-2.30 is the pOH of the NaOH solution.
How pOH is calculated?pOH of any solution is define as the negative logarithm of the concentration of OH⁻ ion present in the solution, and it is represented as:
pOH = -log[OH⁻]
In the question it is given that solution is made from NaOH and NaOH is completely dissociate in the solution. So, the concentration of OH⁻ ion is equal to the concentration of NaOH.
Concentration of NaOH will be calculated in the terms of molarity as:
M = n/V, where
n = moles of NaOH = 0.005 mole
V = volume of NaOH = 1 L
M = 0.005/1 = 0.005 M
So, concentration of OH⁻ ion = 0.005 M
Value of pOH will be calculated as:
pOH = -log(0.005) = -2.30.
Hence, option (4) is correct i.e. -2.30.
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Answer:
The answer is c
Explanation:
2.30
explain why a luminous flame of a Bunsen burner produces bright yellow light
Answer:
because of the small soot particles
Answer:
is due to small soot particles in the flame which are heated to incandescence or the shortage of combustion air .
Describe in your own words how mol/L compares to grams/liter. (similarities and differences)
Both mol/L and g/l are units of concentrations. Mol/L is molar concentration while g/L is mass concentration.
Concentration unitsConcentration refers to the amount of substance in a solution. The two main ways of measuring concentration are;
Molar concentrationMolar massThe molar concentration is measured in mol/L and describes the amount of substance in a litre of solution.
The mass concentration is measured in g/L and measures the mass of the substance in 1 L of solution.
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Runoff from agricultural land carries chemicals from fertilizers that collect in a lake. The buildup of chemicals can eventually cause:.
Answer:
what are the roles of minerals in maintaning homeostasis?
4.
Which series is in order of increasing boiling point?
A. CH2CH2CH3OH CH3COCH3 CH3CH2CH3
B. CH3CH2CH3 CH3COCH3 CH2CH2CH3OH
C. CH3COCH3 CH2CH2CH3OH CH3CH2CH3
D. CH3CH2CH3 CH2CH2CH3OH CH3COCH3
The series which is in order of increasing boiling point is CH3CH2CH3 CH3COCH3 CH2CH2CH3OH
However, the boiling point of an organic substance is the temperature at which the vapor pressure of the liquid organic substance equals the pressure surrounding the liquid and the liquid changes into a vapor.
What are organic compounds?Organic compounds are substance containing carbon and hydrogen. Some few organic compounds include:
AlkanesAlkenesAlkynesAlkanolsAlkanalsAlkanonesEstersAminesSo therefore, the series which is in order of increasing boiling point is CH3CH2CH3 CH3COCH3 CH2CH2CH3OH
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Calculate the molarity of a solution that contains 0.37g CaCl2 in 340 milliliters of solution
Answer:
Your search - Calculate the molarity of a solution that contains 0.37g CaCl2 in 340 milliliters of solution - did not match any news results.
Explanation:
Calculate how many grams of hydrogen can be burned if the limiting factor is 40 liters of oxygen at 200 K and 1 atm.
Since oxygen is the limiting factor of the reaction, 7.14 g of hydrogen is required to react with 40 litres of oxygen.
What is the limiting factor in a reaction?The limiting factor in a reaction is that factor which the reaction depends on in order to proceed.
Once the limiting factor in a reaction is absent, the reaction will stop.
In the reaction between hydrogen and oxygen, twice the volume of hydrogen is required to react with oxygen.
In the given reaction, oxygen is the limiting factor.
Volume of oxygen = 40 litres
Volume of hydrogen required = 40 × 2 = 80 litres
Mass of 22.4 L of hydrogen = 2.0 g
Mass of 80 Litres = 80/22.4 × 2.0 g
Mass of hydrogen = 7.14 g
Therefore, 7.14 g of hydrogen is required to react with 40 litres of oxygen.
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The Rock Shown is Made of Light and Dark Mineral Crystals that are Evenly Distributed.
Which phrase describes the most likely
environment in which this rock formed?
A. Very High Temperature and Pressure
B. Very Low Temperature and Pressure
C. Very Low Temperature and Very High Pressure
D. Very High Temperature and Very Low Pressure
Answer:
It Is A
Explanation:
I took the test and that was the answer
Answer:
high tmp and pressure
Explanation:
2K(5) + Cl2(g) → 2KCI(S)
what type of chemical reaction is this
Answer:
Synthesis Chemical Reaction
Explanation:
A+B -> AB
A sample of gas has an initial volume of 20 L and an initial pressure of 2.5 atm. If the pressure changes to 3.1 atm, what is the new volume, assuming that the temperature remains constant?
Answer:
The answer is 16.12 L
Explanation:
2.5 * 20 = 3.1 * V2
V2 = 50/3.1
V2= 16.12 L
hope this helps
The new volume can be calculated using Boyle's law. If the pressure increases from 2.5 atm to 3.1 atm, then volume decreases from 20 L to 16.1 L.
What is Boyle's law ?Boyle's law is a fundamental law of physics that describes the relationship between the pressure and volume of a gas at a constant temperature. It is named after the Irish physicist Robert Boyle, who first stated the law in the mid-17th century.
Boyle's law states that at a constant temperature, the pressure of a gas is inversely proportional to its volume. This means that as the volume of a gas decreases, its pressure increases proportionally.
Hence,
P1V1 = P1V2.
given,
P1 = 2.5 atm
V1 = 20 L
P2 = 3.1 atm
then V2 = P 1 V1 /P2
V2 = 2.5 atm × 20L/3.1 atm = 16.1 L.
Therefore, the new volume of the gas is 16.1 L.
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Rank the following in order from the most energy released to the least energy released:________.
(a) uranium-235 splitting into two equal fragments,
(b) uranium-235 splitting into three equal fragments,
(c) uranium-235 splitting into 92 equal fragments.
Rank from most to least. To rank items as equivalent, overlap them.
A
B
C
The ranking is uranium-235 splitting into 92 equal fragments, three equal fragments, and two equal fragments. It also releases radiation.
What is nuclear fission?Nuclear fission refers to a natural chemical reaction where an atom nucleus splits into two or more fragments.
This process (nuclear fission) is well known to release huge amounts of energy and radiation.
The more will be the number of atomic fragments, the more will the energy and radiation released by the process of nuclear fission.
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Diuris are common orchids found in Australia. The flowers of this species display a large number of variations in color and markings. Insects rely on the ability to learn the specific colors and markings of unfavorable flowers to avoid them in the future.
How is the variation in color and markings beneficial to the orchid plant?
From what we know, we can confirm that the variations in colors are a mechanism intended to protect the plants from predators.
Why is color a protection mechanism?This can be observed throughout nature. Many poisonous organisms have evolved bright colors intended to be noticed. Over time, this has resulted in many predators avoiding prey with bright colors, in order to avoid the possibility of being poisoned.
Therefore, we can confirm that the variations in colors are likely a mechanism intended to protect the plants from predators.
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Calculate the pH during the titration of 20.00 mL of 0.1000 M dimethylamine, (CH3)2NH(aq), with 0.1000 M HCl(aq) after 21.23 mL of the acid have been added.
The pH value of the solution is mathematically given as
pH=2.35
What pH value of the solution?Question Parameters:
pH during the titration of 20.00 mL of 0.1000 M dimethylamine,
with 0.1000 M HCl(aq) after 21.23 mL of the acid
Generally, the equation for the Chemical Reaction is mathematically given as
(CH3)2NH(aq), +Hcl ---> <---- (CH3)2NH2Cl(aq)
Therefore
[tex]HCl=\frac{0.186mol}{41.86}[/tex]
HCL=0.00444M
WHere
HClaq--->H+(aq)+Cl-(aq)
Hence
H+=0.00444M
pH= -log{H+}
pH=log(0.00444)
pH=2.35
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2. True or false. The body does not digest cellulose.
True
False
Explain anaerobic respiration with yeast in your own words
Answer:
Anaerobic respiration takes place in the absence of oxygen.
Anaerobic respiration in yeast is used during brewing and bread-making.
Explanation:
glucose → ethanol + carbon dioxide.
C 6H 12O 6 → 2C 2H 5OH + 2C0 2.
How can rain provide minerals for a rain forest in South America?
Answer:
That's the answer
Explanation:
Your welcome
Penny reads 11 pages in 1/3 hours what is the unit rate for pages per hours ?
Answer: 33/ because 1/3 of a 11 is 33.
Explanation:
All you had to do was multiply 11 with 3 thats it.
Calcium hydroxide and phosphoric acid react to form calcium phosphate and
water
Answer:
if you are asking for the chemical reaction:
Ca(OH)2 + H3PO4-------> Ca3(PO4)2 + H2O
Explanation:
In this reaction, phosphoric acid, H3PO4 , a weak acid, will react with calcium hydroxide, Ca(OH)2 , a strong base, to produce calcium phosphate, Ca3(PO4)2 , an insoluble salt, and water.
who like math ? Cause I don’t.
Answer:
heheheheheh... I like it
Pls help me im drowned !!!
Hydrochloric acid isa acid so color is red .
#2
Here is the balanced equation
[tex]\\ \rm\Rrightarrow Na_2CO_3+2HCl\longrightarrow 2NaCl+H_2CO_3[/tex]
1 mol Na_2CO_3 takes 2mol HCL
16.2cm^3=0.016L1mol is 22.4L
moles of Na_2CO_3:-
0.016(22.4)=0.36molMoles of HCl=0.36(2)=0.72mol