Which one of the following quantities contains the same number of molecules?.

A. 8g O² and 32g SO².
B. 2g H2 and 44g CO².
C. 28g CO and 14g N².
D. 48g O² and 16g O².

Answers

Answer 1

Answer:

A.8g O² and 32g SO²

[tex] \bold \pink{Hope \: it \: Helps!}[/tex]

Answer 2

The quantities that contain the same number of molecules would be 2g [tex]H_2[/tex] and 44g [tex]CO_2[/tex].

Number of molecules

According to Avogadro, 1 mole different substances contain the same number of molecules.

Thus, the quantities with the same number of moles will be the ones with the same number of molecules.

8g of [tex]O_2[/tex] (molar mass 32) and 32g of [tex]SO_2[/tex] (molar mass, 64) do not equate to the same number of moles.

2g of [tex]H_2[/tex]  (2/2 = 1 mole) and  44 g of [tex]CO_2[/tex]  (44/44 = 1 mole) have the same number of moles.

28g of CO (molar mass, 28) and 14g of [tex]N_2[/tex] (molar mass 28) do not equate to the same number of moles.

Also, 48 g  and 16 g of [tex]O_2[/tex] do not equate to the same mole.

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Related Questions

Which statements differentiate DNA and RNA? Select three options.
A.) DNA is a double helix, and RNA is a single strand.


B.) DNA moves in and out of the nucleus, and RNA stays in the nucleus


C.) DNA is involved only in transcription, and RNA is involved in both transcription and translation.


D.) DNA is involved in both transcription and translation, and RNA is involved only in translation.


E.) DNA does not have uracil as a nitrogen base, but RNA does have uracil as a nitrogen base.





Have a LOVELY day
-Roxanne Wolf

Answers

Answer:

A.) DNA is a double helix, and RNA is a single strand.



C.) DNA is involved only in transcription, and RNA is involved in both transcription and translation.



E.) DNA does not have uracil as a nitrogen base, but RNA does have uracil as a nitrogen base.











Explanation:

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Which transfers thermal energy in the same way the Suns energy is transferred to Earth?
A. The boiling water
B. The burner flame
C. The hot candle
D. The rising steam

Answers

Answer: I think this one is the boiling water


sorry if wrong

Explanation:

Wetlands are able to remove nutrients and chemicals from water as the water flows through the area. A developer is planning to destroy most of the wetlands near a bay. In three to five sentences, explain how destroying the wetlands would impact the bay’s water quality and ecosystem.

Answers

Destroying the wetlands will reduce the bay's water quality and vegetation will not grow effectively near bay as a result of which ecosystem will also destroy.

What is ecosystem?

All species and the physical environment with which they interact make up an ecosystem.

Nutrient cycles and energy flows bind these biotic and abiotic components together. Photosynthesis brings energy into the system, which is absorbed into plant tissue.

As it is already mentioned that, water of the wetlands was carry nutrients which in turn was taken up by plants and vegetation, and if it will destroyed near a bay then the vegetation of that place will destroy as they will not get proper nutrients, which in turn also affects the ecosystem.

Hence destroying the wetlands will reduce the bay's water quality and vegetation will not grow effectively near bay as a result of which ecosystem will also destroy.

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Answer:

First The Answer

Destroying The Wetlands would drastically destroy the ecosystem and water quality in it.

Explanation:

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Anyhow...

THE BEANIE ARMY GROWS!!!!!!!

Chlorine has atomic number 17 and mass number 35. It has:.

Answers

Answer:

Chlorine has 18 neutrons.

Explanation:

Mass number = Atomic number + No. of neutrons

No. of neutrons = Mass number - Atomic  number

                          = 35  -17

                          = 18 Neutrons

                     

19. Which organic molecule are steroids an example of?
O Proteins
O Carbohydrates
Nucleic acid
Lipids

Answers

Steroids are lipids because they are hydrophobic and insoluble in water

lipids

Explanation:

steroids belong to the class of of biochemicals called lipids.

What is the change in enthalpy when 11. 0 g of liquid mercury is heated by 15°c?

Answers

Enthalpy change is the difference between energy used and energy gained. The change in enthalpy of the liquid mercury is 0.0231 kJ.

What is the enthalpy change?

Enthalpy change is the difference between the energy used to break chemical bonds and the energy gained by the products formed in a chemical reaction.

The enthalpy change is given by,

[tex]\rm \Delta H_{rxn} = \rm q_{rxn}[/tex]

and,

[tex]\rm q = mc\Delta T[/tex]

Given,

Mass of the liquid mercury (m) = 11.0 gm

The specific heat of mercury (c) = 0.14 J per g per degree Celsius

Temperature change = 15 degrees Celsius

Enthalpy change is calculated as:

[tex]\begin{aligned} \rm q &= \rm mc\Delta T\\\\&= 11 \times 0.14 \times 15\\\\&= 23.1 \;\rm J\end{aligned}[/tex]

Therefore, 0.0231 kJ is the change in enthalpy.

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a 2 L balloon at a pressure of 1 atm ascends to where there is a pressure of 0.27 atm. what is the new volume of the balloon?

Answers

Answer:

.135 L

Explanation:

P1V1 = P2V2

1*2=.27*V2

(1*2)/.27 = V2

V2 = .27 ÷ 2 = .135

How many grams of pbcl2 will be formed from 50. 0ml of a 1. 50m kcl solution?

Answers

Mass is the multiplication product of moles and the molar mass. The mass of the lead chloride formed from 1.50 M potassium chloride is 10.42 gm.

What is molarity?

The molarity of the solution is the ratio of the moles to the volume of the solution.

The double displacement reaction is shown as,

[tex]\rm 2KCl + Pb(NO_{3})_{2} \rightarrow PbCl_{2} + 2KNO_{3}[/tex]

From the reaction, it can be said that the stoichiometry ratio of potassium chloride and lead chloride is 2:1.

Given,

Molarity of potassium chloride = 1.50 M

1 L of potassium chloride = 1.50 moles

So, 50.0 ml will have,

[tex]\dfrac{1.50 \times 50}{1000} = 0.075\;\rm moles[/tex]

Moles of lead chloride formed will be:

[tex]\begin{aligned} &= \dfrac{1}{2} \times \text{number of KCl moles reacted}\\\\&= \dfrac{0.075}{2}\\\\&= 0.0375\;\rm moles\end{aligned}[/tex]

Given,

Moles of lead chloride = 0.0375 moles

Molar mass of lead chloride =  278 g/mol

Mass of lead chloride is calculated as:

[tex]278 \times 0.0375 = 10.42 \;\rm gm[/tex]

Therefore, 10.42 gm of lead chloride is formed.

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What happens when the compound NaCl is formed?

Sodium transfers an electron to chlorine.

Sodium receives two electrons from chlorine.

Sodium forms an ion with −1 charge and chlorine forms an ion with +1 charge.

Sodium forms an ion with +2 charge and chlorine forms an ion with −2 charge.

Answers

The answer is (sodium transfers an electron to chlorine)

PLEASE PLEASE HURRY AND HELP WILL MARK
BRANILEST!!! List the controlled variables for this lab. (Correct me if I’m wrong on the one answered PLEASE)

Answers

Here you go hope this helps :))

K12 how the gene works unit test answer

Answers

Answer:

genes are small sections of DNA. These genes contain instructions that tell your cells to make molecules called proteins. And the protein do things to your body to keep you healthy. Genes determine traits as well.

Identify parts A-E on the following energy diagram.

Answers

Answer:

See below

Explanation:

A  Reactants

B  Activation energy

C  transition state

D  enthalpy change

E   products

1. The concentration of ammonium sulphate in soil can be determined by dissolving the salt and after filtering, adding acidified barium chloride to the solution. The insoluble barium sulphate (BaSO4) that forms is separated, dried and then weighed. In an experiment to determine the concentration of ammonium sulphate in soil, it was found that 1 kg of soil yielded 0.016 g of BaSO4. 1.) calculate the moles of BaSO4 in 0.116g​

Answers

The number of mole present in 0.116 grams of barium sulphate, BaSO₄ is 0.0005 mole

Description of mole

The mole of a substance is related to it's mass and molar mass according to the following equation:

Mole = mass / molar mass

How to determine the mole of BaSO₄

From the question given above, the following data were obtained:

Mass of BaSO₄ = 0.116 g gMolar mass of BaSO₄ = 137 + 32 + (16×4) = 233 g/mol Mole of BaSO₄ =?

Mole = mass / molar mass

Mole of BaSO₄ = 0.116 / 233

Mole of BaSO₄ = 0.0005 mole

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Y'all, I need your help, these science questions are due tonight and I'm really stuck , please show work as well

Answers

Answer:

Explanation:

a) v=w*lambda

wavelength=5/2.5

wavelength=2m

b)342/320=1.06875m

c)342/1.5=228 Hz

d)4.6153=v/wave

What is the volume of 220g of an object with a density of 55g/cm^3

Answers

Answer: 4g/cm3
Explanation: hand sanitizer

use dimensional analysis and set up your equation like so:

[tex]=220g\ x\ \frac{cm^3}{55g}[/tex]

the unit grams would cancel which leaves the unit of cm³, which is the unit for volume in this case.

The volume of 220g of an object with a density of 55g/cm³ is 4 cm³.

A frying pan is connected to a 110-volt circuit. If the resistance of the frying pan is 10 ohms, how many amperes does the frying pan draw?

Answers

Answer:

11 A

Explanation:

⇒ V = IR

⇒ 110 V = I * 10 Ω

⇒ I = 110/10

⇒ I = 11 A

The current flowing through the frying pan is equal to when 110 Volts are connected to the circuit.

What is Ohm's law?

Ohm’s law can be described as the voltage difference across any conductor being directly proportional to the electric current passing through that conductor. Assuming temperature and other conditions remain constant.

Ohm’s law can be applied only if the temperature will be constant. Ohm’s S.I. unit is rho (Ω), and the electric current raises the temperature.

The mathematical expression of voltage difference provided by Ohm's law is:

V = IR

Where V is the voltage difference and R is the resistance and I the electric current flowing.

Given, the voltage difference of the circuit,  V = 110 V

The resistance flowing through the circuit, R = 10 Ω

The electric current flowing through the frying pan can be calculated as:

I = V/R

I = 110/10

I = 11 A

Therefore, the electric current across the circuit is equal to 11 A.

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In a hydrogen bomb, hydrogen is converted into:

A) U-238

B) Helium

C) U-235

D) Barium

Answers

Answer:

helium ................

In order for a reaction to take place there must be sufficient energy, a significant number of collisions between molecules, and there must be a fraction of the collisions that have the correct molecular orientation. Which chemist said this?

Answers

Answer:

This theory(Collision theory) was proposed by Max Trautz and William Lewis.

A tire at 21°c has a pressure of 0.82 atm. its temperature decreases to –3.5°c. if there is no volume change in the tire, what is the pressure after the temperature change? use startfraction p subscript 1 over t subscript 1 endfraction equals startfraction p subscript 2 over t subscript 2 endfraction.. 0.75 atm 0.89 atm 1.1 atm 1.3 atm

Answers

The pressure of the tyre after the temperature change is 0.89atm. Details about pressure can be found below.

How to calculate pressure?

The pressure of the tyre can be calculated using the following equation:

P1/T1 = P2/T2

Where;

P1 = initial pressureP2 = final pressureT1 = initial temperatureT2 = final temperature

According to this question, a tyre at 21°C (294K) has a pressure of 0.82 atm. Its temperature decreases to –3.5°C (269.5K).

0.82 × 294 = P2 × 269.5

241.08 = 269.5P2

P2 = 241.08 ÷ 269.5

P2 = 0.895atm

Therefore, the pressure of the tyre after the temperature change is 0.89atm.

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Answer: 0.75 atm

Explanation: just did test on edge

Which of these is not one of the parts of an atom?
electron

A. proton

B. neutron

C. All of these are parts of an atom.

Tysm if you answered

Answers

Answer:

All of these are part of an atom.

Perform the following mathematical operation and then report the answer in scientific notation.

554.3x10^117 - 5044x10^116 =

If an incorrect number of significant figures is used, the problem will be marked wrong.

Answers

The result of 554.3x10^117 - 5044x10^116 in standard form is  -4988.57 x10^116

What is standard form?

The term standard form refers to a way in which mathematical notation is made much easier. It is always a number multiplied by 10 raised to a given power.

As such, the problem 554.3x10^117 - 5044x10^116 can be written as; 55.43x10^116 - 5044x10^116 = -4988.57 x10^116

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would a 0.48 m or a 1.48 m solution have a higher boiling point?

Answers

Answer:

1.48 m solution would have a higher boiling point

Explanation:

It is harder to boil larger bodies of water than it is to boil a small body of water. This is because there is more surface area in the small body of water than the bigger one.

As surface area increases, reaction time increases.

Reactions would become slower.

What is the job of the colon?

Answers

The colon removes water and some nutrients and electrolytes from partially digested food.

What is colon?

All it means is that there's an intimate physical mixture of the specified components in a solid or liquid phase.

The large intestine has 3 primary functions: absorbing water and electrolytes, producing and absorbing vitamins, and forming and propelling faeces toward the rectum for elimination.

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These healthy fats are needed by your body that have 1 or more double bond
a). triglycerides
b). saturated
c). polysaccharides
d). unsaturated

Answers

C.) polysaccharides

Which gas law should be used in the following problems: A sample of nitrogen (N2) has a volume of 50.0 L at a pressure of 760 mmHg. What is the volume of gas at a pressure of 1500 mmHg if there is no change in temperature

Answers

Boyles Law = P1V1 = P2V2

Which description correctly characterizes the acidity or basicity of a solution?.

Answers

The description that correctly describes the acidity or the basicity of a solution is that:

The higher the pH is, the more the hydroxide ion concentration increases and the more basic the solution becomes.

How is the pH determined?

The pH of a solution is determined by the strength of the acid and the base pair. Both of these are dependent on the same chemical reaction.

As the pH rises, the the hydroxide ion is increased in concentration and the solution gets to be more basic.

acidity -the amount of H+ ions can be produced by a compound determines the acidity

pH range:less than 7

acidity increase with decrease in pH number

basicity- the amount of OH- ion can be produced by a compound determines basicity

pH range : 8 to 14

7 is neutral

Basicity increases with increase in number.

Therefore the higher the pH is, the more the hydroxide ion concentration increases and the more basic the solution becomes.

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How do the degrees of dissociation differ for strong acids and weak acids?.

Answers

For strong acids such as H2SO4 (Sulphuric acid) and HCL (Hydrochloric acid), H+ ions dissociate completely. For weak acids like CH3COOH (Vinegar, or otherwise known as ethanoic acid), the dissociation of the H+ ions is partial. (There is a dynamic equilibrium, H+ ions dissociates and form back into the reactant)

Since the concentration of H+ ion determines the acidity, it could be explained as such.

Maurels
5. Explain what happens
to the kinetic energy when
you tap the first domino in
a row of dominos?

Answers

Answer:the force of gravity turn that potential energy into enough kinetic energy to topple a domino larger than its self.

Explanation:

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Determine the number of grams of NaHCO3 that are in one liter of a 2.1 M solution

Answers

[tex]\text{Molarity,}~ S= 2.1~mol/L\\\\\text{Molar mas of}~ NaHCO_3, ~M=84~~ g/mol\\\\\text{Volume,}~~ V = 1 ~L\\\\\text{Mass,} ~w = ?[/tex]

[tex]\text{ We know that,}\\\\~~~~~S = \dfrac{n}V\\\\\implies n = SV\\\\\implies \dfrac{w}{M} = SV\\\\\implies w = SVM\\\\\implies w= 2.1 \times 1 \times 84\\\\\implies w =176.4 ~ g[/tex]

What volume of nitrogen (n2) would be completely consumed in the reaction with 30.80 g of
hydrogen gas(h2)?

Answers

The answer is 285.33g nitrogen would be completely consumed in the reaction with 30.80 g of hydrogen gas.

What is a mole ?

A mole is defined as 6.02214076 × 10²³ atoms, molecules, ions, or other chemical units.

Write a balanced equation.

Calculate the moles of H₂ in 30.8 g.

Calculate the moles of N₂ required to react with H₂.

Calculate the mass of N₂.

Calculate the initial mass of N₂.

Start with a balanced equation.

N₂ + 3H₂ --> 2NH₃

Calculate the moles of H₂ in 30.8 g.

n = m/M; where n = moles, m = mass, and M = molar mass.

M(H₂) = 1.008 g/mol

n(H₂) = (30.8 g)/(1.008 g/mol) = 30.56 mol H₂

Calculate the moles of N₂ required to react with 30.56 mol H₂ , using the mole ratio between H₂ and N₂ in the balanced equation.

30.56 mol H₂ × 1 mol N₂/3 mol H₂ = 10.18 mol N₂

Calculate the mass of N₂ in 10.18 mol.

m = n × M

M(N₂) = 2 × 14.007 g/mol N = 28.014 g/mol N₂

m(N₂) = 10.18 mol × 28.014 g/mol = 285.33g N₂

Therefore 285.33g nitrogen would be completely consumed in the reaction with 30.80 g of hydrogen gas.

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