Molar Volume of Gas

Front

What is Avogadro's number?

Back

Avogadro's number is 6.022 x 10^23, which is the number of representative particles (atoms, molecules, etc.) in one mole of a substance.

Front

What is the molar volume of a gas at room temperature and pressure (RTP)?

Back

The molar volume of a gas at RTP is approximately 24 liters.

Front

Define a mole in terms of representative particles.

Back

A mole is defined as the amount of substance that contains as many representative particles as there are atoms in 12 grams of carbon-12.

Front

What is the relationship between moles and volume for gases at standard temperature and pressure (STP)?

Back

At STP, one mole of an ideal gas occupies 22.4 liters.

Front

What is the mole ratio in a chemical reaction?

Back

The mole ratio is the ratio of the coefficients of reactants and products in a balanced chemical equation, indicating the proportion in which substances react or are produced.

Front

In the reaction N2 + 3H2 → 2NH3, what is the mole ratio of N2 to NH3?

Back

The mole ratio of N2 to NH3 is 1:2.

Front

If 3 moles of HCl are used in the reaction Zn + 2HCl → ZnCl2 + H2, how many moles of H2 are produced?

Back

1.5 moles of H2 are produced.

Front

What is the significance of the term 'excess reactant'?

Back

An excess reactant is a substance that is not completely used up in a chemical reaction, meaning there is more of it than is required to react with the limiting reactant.

Front

How do you calculate the number of moles from mass?

Back

Number of moles = mass (g) / molar mass (g/mol).

Front

What is the definition of a limiting reactant?

Back

The limiting reactant is the substance that is completely consumed in a chemical reaction, limiting the amount of product formed.