Answer:
waxing crescent is the right answer to this question
What is nomenclature? -,-
Answer:
the devising or choosing of names for things, especially in a science or other discipline.
Explanation:
Hope It's Help
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Answer: A nomenclature is a system of naming organisms.
The species to which the organism belongs is indicated by two words, the genus and species names, which are Latinized words derived from various sources.
Explanation:
Bisphenol A is a fat soluble chemical and can get stored in the fat cells of humans. Steven henteges , a spokesman for the American chemistry council said the new data on a consumer exposure to BPA in Canada is very reassuring. Do you think this statement is reassuring? Explain your reason.
(Help me pleaseee!) URGENTLY
Answer:
what do you need to know to decide whether this statement is correct?
What is the pOH of a solution of HNO3 that has [OH– ] = 9. 50 × 10–9 M?.
8.022 is the value of pOH of the HNO₃ solution.
How pOH can be calculated?pOH of the HNO₃ solution can be calculated as:
pOH = -log [OH⁻], where
[OH⁻] = concentration of hydroxyl ion = 9. 50 × 10⁻⁹ M
Putting this value in the above equation, we get
pOH = -log ( 9. 50 × 10⁻⁹)
pOH = - (- 8.022) = 8.022
Hence, pOH of the HNO₃ solution is 8.022.
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Plants and animals are both multicellular eukaryotes, but only animals are what?
A. Autotrophic
B. Heterotrophic
C. Prototropic
D. Homotrophic
1: What type of acid-base reactions are solely defined by how protons are given up or are taken? (0.5pt)
2: What is a Hydroxide ion? (0.5pt)
3: What two products do all acid-base neutralization reactions produce (0.5pt)?
4: Calculate the pH of a 0.25M solution of H3O+ (0.5pt)
5: Calculate the pH of a 6.3x10-8M solution of H3O+ (0.5pt)
6: Look at your answer for 4 and 5 which one is a base? (0.25pt)
7: Look at 4 and 5 which one is a strong acid (be careful with this one I will know that you didn't watch the recording if you get it wrong) (0.25pt)
An acid-base reaction involves the exchange of one or more hydrogen ions H+ which leads to the production of water and salt.
What is a acid–base reaction?An acid–base reaction is a type of chemical reaction that involves the exchange of one or more hydrogen ions H+ means proton, between reactive species. For example, the hydrochloric acid (HCl) reacts with sodium hydroxide (NaOH) produces a solution of sodium chloride (NaCl) and water molecules.
What is a Hydroxide ion?The hydroxide ion is a negatively charged molecule that made up when hydrogen atom bonded to oxygen atom at 1:1 form. It acts as a base that forms ionic compounds when bonded to a positively charged ion molecule.
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What is the molality of a CaCl2 solution that contains 166.5 g CaCl2 and is dissolved in 3.5kg of water? 0.429 molal 47.6 molal 5.25 molal 1.50 molal
The molality of the CaCl₂ solution given that 166.5 g of CaCl₂ dissolves in 3.5 Kg of water is 0.429 M
What is molality?This is the defines as the mole of solute per unit mass (in Kilogram) of water.
Molality = mole / mass of water (in Kg)
How to determine the mole of CaCl₂The mole of 166.5 g of CaCl₂ can be obtained as illustrated below:
Mass of CaCl₂ = 166.5 gMolar mass of CaCl₂ = 40 + (35.5×2) = 111 g/moleMole of CaCl₂ = ?Mole = mass / molar mass
Mole of CaCl₂ = 166.5 / 111
Mole of CaCl₂ = 1.5 moles
How to determine molality of the solutionThe molality of the CaCl₂ solution can be obtained as illustrated below:
Mole of CaCl₂ = 1.5 molesMass of water = 3.5 KgMolality of CaCl₂ = ?Molality = mole / mass of water (in Kg)
Molality of CaCl₂ = 1.5 / 3.5
Molality of CaCl₂ = 0.429 M
Thus, the molality of the solution is 0.429 M
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A student heats the same amount of two different liquids over Bunsen burners. Each liquid is at room temperature when the student begins. If Liquid 1 has a higher specific heat than Liquid 2, then Liquid 1 will evaporate sooner. evaporate sooner. take longer to increase in temperature. take longer to increase in temperature. condense over a longer period. condense over a longer period. chemically break down at a faster rate.
If Liquid 1 has a higher specific heat than Liquid 2, then Liquid 1 will take longer to increase in temperature because the higher specific heat of a liquid needs more thermal energy for heating a liquid.
What is specific heat?Specific heat of a substance refers to the quantity of heat that is required to raise the temperature of one gram of a substance by one Celsius degree so we can conclude that Liquid 1 will take longer to increase in temperature
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A sample of nitrogen gas is produced in a reaction and collected under water in a graduated cyliner. The temperature is 26.3 oC and the volume of gas is 45.1 mL. During this experiment the total pressure in the graduated cylinder is 735 mm Hg. How many grams of nitrogen were collected
The mass of nitrogen collected is mathematically given as
M-N2=0.025gram
What is the mass of nitrogen collected?Question Parameters:
A sample weighing 2.000g
the liberated NH3 is caught in 50ml pipeful of H2SO4 (1.000ml = 0.01860g Na2O).
T=26.3c=299.3K
Pressure=745mmHg=745torr
Pressure of N2=745-25.2=719.8torr
Generally, the equation for the ideal gas is mathematically given as
PV=nRT
Therefore
719.8/760=45.6/1000=n*0.0821*299.3
n=0.00176*14
In conclusion, the Mass of N2
M-N2=0.00176*14
M-N2=0.025gram
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Chromate ions react according to the following equation, where the left side of the reaction is yellow and the right side is orange.
CrO42– + 2H+ ⇄ Cr2O72– + H2O
A student adds sodium hydroxide (NaOH) to the solution at equilibrium. In one to two sentences, describe and explain any changes to the solution that the student will observe.
please helpp
NaOH is a base and addition of NaOH will cause the left reaction to proceed and the solution turns yellow.
What is chemical equilibrium?Chemical equilibrium refers to a dynamic stare in which the forward and reverse reactions are occurring at the same time at the same rate.
Any change in the reaction conditions will cause equilibrium to shift either to the left or right.
In the given equation, addition of acid will result in the forward reaction proceeding and the solution turns orange.
The left reaction is favoured on addition of base.
Since NaOH is a base, addition of NaOH will cause the left reaction to proceed.
The solution turns yellow
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The change to the solution is that the addition of NaOH will cause the left reaction to proceed and the solution turns yellow.
What is a solution?A solution means a special type of homogeneous mixture that is composed of two or more substances.
It should be noted that a change in the reaction conditions will cause the equilibrium to shift either to the left or right.
In this case, the addition of NaOH will cause the left reaction to proceed and the solution turns yellow.
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If a teaspoon of sugar dissolved
completely in a glass of water, what type
of mixture is this?
A. heterogeneous
B. homogeneous
C. element
Answer:
b
Explanation:
it's a homogeneous ,because the sugar has completely dissolved into the water and stays completely clear throughout the glass of water.
The solubility of a solute is the largest amount of solute that can dissolve in a certain quantity of __________. Which word best completes this statement?.
Answer:
Solvent
Explanation:
The solute is the substance that is dissolved.
The solvent is the substance that the solute is dissolved in.
The whole mixture is called the solution
Answer:
Solvent
Explanation:
I Took The Test
What vocabulary term refers to the offspring when it possesses the same trait for both genes?
Given what we know, we can confirm that the term used to describe an offspring that possesses the same trait for both genes is homzygous.
What does it mean to be homzygous?This is as indicated in the question, it refers to organisms that have inherited the same allele for a gene from both parents. Meaning that both variations of said gene in this individual are the same and therefore, there is no possibility of a distinct expression.
Therefore, we can confirm that the term used to describe an offspring when it possesses the same trait for both genes is homzygous.
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Answer:
Dominant
Explanation:
Dominant, as related to genetics, refers to the relationship between two inherited versions of a gene related to that trait.
10. The hottest stars in the sky are A about 200,000°c B about 5,800°c C about 22.000.
Help this is timed ! help me please
Answer: 22,000 C
Explanation:
Break the numbers apart to make them smaller then multiply and add them back to the big number and there is your answer
Answer:
The hottest known star, WR 102, is one such Wolf-Rayet, sporting a surface temperature more than 35 times hotter than the Sun.
Wolf-Rayet stars come in a variety of flavors.So I'd say B about 5,800°cHope this helps, have an awesome day.Using information from the periodic table,
explain why radium forms chemical bonds in the
same way as calcium does.
Bothe calcium and radium are second group elements in periodic table with two valence electrons. They exhibit similar physical and chemical properties.
What are groups in periodic table?All the elements in periodic table are classified into different groups and periods. The horizontal rows in periodic table are called periods. From left to right in a period the atomic number increases.
The vertical columns in the periodic table are called groups. Down a group the number of shells increases thereby the atomic size also. A group contains elements with same number of valence electrons and similar physical and chemical properties.
Calcium and radium are in the second group of periodic table and they are called the alkaline earth metals. Both contains two valence electrons and they will participate in chemical bonding by losing these two electrons and thus are divalent cations.
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Why is better separation of two liquids achieved by slow rather than fast distillation?.
Answer:
A one mL per minute rate (or slower) is recommended for best results in a fractional distillation; simple can go faster. Slow, gradual distillation essentially allows the best equilibration and heat transfer. If you heat too fast, vapors may not condense as quickly as desired, and may waste some of the column.
A gas at a constant pressure occupies 2.24 L at 52 C. If the sample is cooled United it takes up 1.66 L what is the new temperature?
A. 0.01 K
B. 0.01 C
C. 32 C
D. 241 K
PLS SHOW WORK
Answer:
D is the answer!Explanation:
Using Charles's Law to solve this question: V1/T1 = V2/T2
V1 = 2.24L
T1 = 52C (covert to Kelvin by plus 273.15) = 325.15K
V2 = 1.66L
T2 = ?
V1/T1 = V2/T2 must change to V2×T1/V1 = T2
1.66 x 325.15/2.24 = V2
V2 = 240.96K ≈ 241K
Please help its urgent
Answer:
C
Explanation:
I picked C because the plant is interacting with the sun which is a nonliving part of the environment.
A, B and D are wrong because seaweed, horses, and trees are living things.
Answer:
C) A plant bending towards the sunlight
Explanation:
A) is incorrect because both the lobster and the seaweed are organisms! Likewise, so are B) and D). D) might seem a little tricky, but ultimately the squirrel is interacting with the tree by living inside it.
A plant bending towards the sunlight, however, is an organism having a response to a factor in its environment.
Your company currently uses a process with a similar cost of materials that has an average
percent yield of 91 percent. If the average percent yield of this process is higher than that,
this could save the company money. What is your recommendation to the company? Please
support your recommendation using your data, calculations, and understanding of
stoichiometry gathered from this lab. /
The second method is recommended due to high efficiency.
What method should be recommended?If the average percent yield of this process is higher than that, this could save the company money so my recommendation to the company is to adopt the other method for production because it is less costly and providing similar result.
In conclusion, the second method is recommended due to high efficiency.
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In which section(s)/point(s) is the car not moving/at rest?
Answer:
a-b and e-f
Explanation:
No change in distance during these periods as there is change in time.
Answer:
[tex]\huge\boxed{\sf\: e \: -\: f \:\: and \:\: a \: -\: b}[/tex]
Explanation:
The car is not moving / is at rest from section(s) e to f & a to b.
Here, from e to f & a to b, we can see in the distance-time graph that the car shows no motion & is present in the same direction even though the time changes. Hence, we can infer that the car is at rest.
If the line goes up then the speed increases, if it's moving down then the speed decreases & if the line is the same then the car is at rest.
[tex]\rule{150}{2}[/tex]
What distance do I cover if I travel at 10 m/s E for 10 s
H2S has what kind of intermolecular force?
a. dipole dipole
b. ionic
c. london dispersion
d. hydrogen bond
explain why
Answer:
A
Explanation:
The intermolecular force which polar molecules take part in are dipole-dipole forces.
A sample of sulfur dioxide (SO2) is initially at a temperature of 105C, a volume of 15 L, and a pressure of 1.5 atm. If the volume changes to 25 L and the temperature increases to 181C, what is the new pressure? Show your work.
The new pressure is 1.08 atm
Gas lawsFrom the question, we are to determine the new pressure
Using the General gas equation,
[tex]\frac{P_{1}V_{1} }{T_{1}} = \frac{P_{2}V_{2} }{T_{2}}[/tex]
Where
P₁ is the initial pressure V₁ is the initial volumeT₁ is the initial temperature P₂ is the final pressure V₂ is the final volume T₂ is the final temperatureFrom the given information,
P₁ = 1.5 atm
V₁ = 15 L
T₁ = 105 C = 105 + 273.15 = 378.15 K
V₂ = 25 L
T₂ = 181 C = 181 + 273.15 = 454.15 K
P₂ = ?
Putting the parameters into the equation, we get
[tex]\frac{1.5 \times 15}{378.15} = \frac{P_{2} \times 25 }{454.15}[/tex]
[tex]P_{2}= \frac{1.5 \times 15 \times 454.15}{25 \times 378.15}[/tex]
P₂ = 1.08 atm
Hence, the new pressure is 1.08 atm
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can someone explain this to me please?
Answer:
Concentration of this solution = 12g/60dm3
Concentration of this solution = 0.2g/dm3
Explanation:
Just use 12 ÷ by 60 as they want the simplify answer
6. Identify a factor that is NOT responsible for the formation of sedimentary rocks.
A
glacier
B
magma
o
С
river
D
wind
Answer:
Magma is not a factor responsible for the formation of sedimentary rock.
Explanation:
Which planets are the most dense?
the outer planets Jupiter, Saturn, Uranus, Neptune
the inner planets Jupiter, Saturn, Uranus, Neptune
the inner planets Mercury, Venus, Earth, and Mars
the outer planets Mercury, Venus, Earth, and Mars
Answer:
mars is the most dense I believe
Answer:
A the outer planets Jupiter, Saturn, Uranus, Neptune
Explanation:
4. What happens to the land between 600 feet above sea level and the lake?
Answer:
I think Niagra falls happen
for every 0.50 moles of CaC2O4 formed, how many moles of NaI are Formed?
Answer:
1.45 moles of Na2O produced
Explanation:
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Convert 30.0g Cu2SO4 to moles
please help
Answer:
0.1 moles
Explanation:
1 grams Cu2SO4 to mol = 0.00448 mol
30 grams Cu2SO4 to mol = 0.13443594709676698 mol
if we round that up - 0.1
PLEASE HELP!!!!!
Deep-sea divers use a breathing mixture of helium, oxygen, and carbon dioxide. What is the partial pressure of oxygen if the total pressure of the mixture is 760 mm Hg, the pressure exerted by the helium is 609 mm Hg, and the pressure exerted by the carbon dioxide is 1 mm Hg?
A
760 mm Hg
B
500 mm Hg
C
150 mm Hg
D
609 mm Hg
A gaseous mixture (760 mmHg) containing helium (609 mmHg), carbon dioxide (1 mmHg) and oxygen (C. 150 mmHg).
What does Dalton's law of partial pressures state?Dalton's law of partial pressures states that the total pressure of a mixture of gases is equal to the sum of the partial pressures of the component gases.
A gaseous mixture with a total pressure of 760 mmHg contains Helium (609 mmHg), carbon dioxide (1 mmHg) and oxygen. We can calculate the partial pressure of oxygen using Dalton's law.
P = pHe + pCO₂ + pO₂
pO₂ = P - pHe - pCO₂
pO₂ = 760 mmHg - 609 mmHg - 1 mmHg = 150 mmHg
where,
P is the total pressure.pHe is the partial pressure of helium.pCO₂ is the partial pressure of carbon dioxide.pO₂ is the partial pressure of oxygen.A gaseous mixture (760 mmHg) containing helium (609 mmHg), carbon dioxide (1 mmHg) and oxygen (C. 150 mmHg).
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what is the standard cell notation for a galvanic cell with aluminum and gold electrodes
The standard cell notation for an Galvanic cell with aluminum and gold electrodes is Au(s)| Au³⁺ || Al³⁺| Al (s)
What is an Electrolytic Cell ?A device in which electrical energy is converted into chemical energy or chemical energy is converted into electric energy is called an Electrolytic cell
The electrolytic cell consists of two metallic electrodes and an electrolyte.
In this cell nomenclature, the electrode to the left of the salt bridge is always assumed to be the anode, and the accompanying half-equation is always stated as an oxidation , while right side is cathode and the half equation is Reduction.
Reaction at Anode:Au(s) → Au³⁺(aq) + 3e⁻ ..........(oxidation)
Reaction at Cathode:Au³⁺(aq) + 3e⁻ →Au(s) ..............(reduction)
Therefore, The standard cell notation for an electrolytic cell with aluminum and gold electrodes Au(s)| Au³⁺ || Al³⁺| Al (s)
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Answer:
AI(s) I AI3+(aq) ii Au+(aq) I Au(s)
Explanation:
I just got it wrong