CHEMISTRY HIGH SCHOOL

At constant temperature and pressure, 2.05 g of oxygen gas O2 is added to a 1.0 L balloon containing 1.00 g of O2. What is the new volume of the balloon?

Answers

Answer 1

Answer:

Answer:

1.50 L.

Explanation:

From the general gas law:

PV = nRT,

Where, P is the pressure if the gas,

V is the volume if the gas container,

n is the no. of gas moles,

R is the general gas constant,

T is the temperature of the gas.

At constant P and T:

n₁V₂ = n₂V₁.

V₁ = 1.0 L, V₂ = ??? L.

n₁ = mass/molar mass = (2.05 g)/(32.0 g/mol) = 0.064 mol.

n₂ is the no. of moles of the total gas (2.05 g + 1.0 g).

n₂ = n₁ + (1.00 g)/(32.0 g/mol) = 0.0953 mol.

∴ V₂ = n₂V₁/n₁ = (0.0953 mol)(1.0 L)/(0.064 mol) = 1.489 L ≅ 1.50 L.

Related Questions

What is scientific consensus?O a new scientific idea that was confirmed by the original researcheran idea that has been changed due to new informationO a general agreement among scientists about a scientific ideathe understanding that knowledge in a particular area can be uncertain
Based on the law of Conservation of Mass, what happens to the mass of a substance in a chemical change? A: the mass is always conserved B: The mass is either created or destroyed C: the reactant always has more mass D: the product always has more mass
Which of the following refers to the process of hydrolysis?A.) In hydrolysis, a molecule of water is released when two molecules are joined together. B.) The end result of hydrolysis is a chain of molecules such as a polysaccharide. C.) Water is needed for hydrolysis to take place. D.) Hydrolysis is the process in which plants and animals create complex molecules such as carbohydrates and proteins.
True or false: Chlorine treatment is effective in removing Cryptosporidium from water.
If a compound has a molar mass of 180 g/mol and its empirical formula is CH2O, what is its molecular formula? CH2O C2H4O2 C6H12O6 C12H22O11

How many molecules are in 165 g of carbon dioxide?

Answers

Answer: $22.6 * 10^(23)$ molecules

Explanation:

To calculate the moles, we use the equation:

$\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}$

For $CO_2$

Given mass= 165 g

Molar mass of $CO_2$ = 44 g/mol

Putting values in above equation, we get:

$\text{Moles of}CO_2 =(165g)/(44g/mol)=3.75mol$

According to avogadro's law, 1 mole of every substance weighs equal to the molecular mass and contains avogadro's number $6.023* 10^(23)$ of particles.

1 mole of $CO_2$ contains = $6.023* 10^(23)$ molecules of $CO_2$

Thus 3.75 moles $CO_2$ contains = $(6.023* 10^(23))/(1)* 3.75=22.6 * 10^(23)$ molecules of $CO_2$

Thus there will be $22.6 * 10^(23)$ molecules of $CO_2$

The molar mass of CO2 is 44 grams per mole.

165 grams / 44 grams per mole of CO2 = 3.75 moles CO2

Using Avogadro’s law where 1 mole of substance equals 6.023 x 10^23 molecules

3.75 moles CO2 (6.023 x 10^23 molecules /mole) = 2.26 x 10^24 molecules CO2

When the pH of a solution changes from a pH of 5 to a pH of 3, the hydronium ion concentration isA. 0.01 of the original content
B. 0.1 of the original content
C. 10 times the original content
D. 100 times the original content

Answers

Answer : The correct option is, (D) 100 times the original content.

Explanation :

As we are given the pH of the solution change. Now we have to calculate the ratio of the hydronium ion concentration at pH = 5 and pH = 3

As we know that,

$pH=-\log [H_3O^+]$

The hydronium ion concentration at pH = 5.

$5=-\log [H_3O^+]$

$[H_3O^+]=1* 10^(-5)M$ ..............(1)

The hydronium ion concentration at pH = 3.

$3=-\log [H_3O^+]$

$[H_3O^+]=1* 10^(-3)M$ ................(2)

By dividing the equation 1 and 2 we get the ratio of the hydronium ion concentration.

$([H_3O^+]_(original))/([H_3O^+]_(final))=(1* 10^(-5))/(1* 10^(-3))=(1)/(100)$

$100* [H_3O^+]_(original)=[H_3O^+]_(final)$

From this we conclude that when the pH of a solution changes from a pH of 5 to a pH of 3, the hydronium ion concentration is 100 times the original content.

Hence, the correct option is, (D) 100 times the original content.

pH = -log( [H3O+] )
so the pH is in powers of 10
1* 10^ 5 / 1*10^3 = 1* 10^2 = 100
so the answer is:
D. 100 times the original content

The ratio of chromium to iron to carbon variesamong the different types of stainless steel.
Therefore, stainless steel is classified as
(1) a compound (3) a mixture
(2) an element (4) a substance

Answers

The correct answer is option 3. Stainless steel is a mixture of different substances. Mixture is defined us a system that is made up of two or more substances which are mixed but are not chemically combined. In stainless steel, the components are not chemically combined.

Answer: mixture

Explanation:

Compound is a pure substance which is made from atoms of different elements combined together in a fixed ratio by mass.It can be decomposed into simpler constituents using chemical reactions. Example: water $H_2O$

Element is a pure substance which is composed of atoms of similar elements. It can not be decomposed into simpler constituents using chemical reactions.Example: Copper $Cu$

Mixture is a substance which has two or more components which do not combine chemically and do not have any fixed ratio in which they are present.Example: Alloys

As steel is made up of combination of carbon and chromium and are not present in any fixed ratio , steel is classified as a mixture.

Which statement describes a chemical proper of magnesium 1. Magnesium is malleable
2.Magnesium conducts electricity
3.Magnesium reacts with an acid
4.Magnesium has a high boiling point

Answers

The statement describes a chemical proper of magnesium is that Magnesium reacts with an acid. The answer is number 3. The reset of the choices describe Magnesium's physical properties

Carbon dioxide is one of the main gases in the mixture of gases coming out of the kiln.Give two reasons why.

Answers

because the kiln utilizes fire, fire uses oxygen and the fuel to create CO2
CO2 would be the main gas because the main components of the reactants are carbon and oxygen, which make up CO2

Which nuclear emission has no charge and no mass?(1) alpha particle (3) gamma ray
(2) beta particle (4) positron

Answers

Answer: Gamma ray

Explanation: Nuclear Emission explains the release of energy stored in the nucleus of an atom in the form of particles like alpha particles, beta particles, gamma ray etc.

Alpha particles are the helium atom having +2 charge.

Beta particles have -1 charge thus beta particle and the electron are same.

Positron has a charge of +1 electron having 1/2 spin.

Gamma rays are the rays which are neutral and have no mass.

Final answer:

A gamma ray is a nuclear emission that has no charge and no mass.

Explanation:

Nuclear radiation refers to the emission of particles or electromagnetic waves from atomic nuclei undergoing decay. Types include alpha, beta, and gamma radiation, each with varying properties and effects. It is a fundamental concept in nuclear physics and has applications in medicine, energy production, and weaponry.

The nuclear emission that has no charge and no mass is the gamma ray. Unlike the other options listed, which are particles, gamma rays are electromagnetic radiation and do not have mass or charge. They are highly penetrating and can pass through many materials without being deflected.

Learn more about nuclear emission here:

brainly.com/question/32466060

#SPJ6

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