is how much 3D space matter occupies.  It is usually measured in cm³.

of something is 6.02 × 10²³ of it. The mass of a mole of a substance is its relative mass expressed in grams.

is the volume occupied by one mole of any gas. It is equal to 24 dm³ or 24 000 cm³ at room temperature and pressure.

refers to the molar ratio of the reactants and products in a chemical reaction.

is a property of a substance and is its mass divided by its volume.

Gas volumes

Chemistry

In the Making salts unit, pupils will learn about the production of pure salts, concentration and strength of acids, and what makes acids acidic and how bases can neutralise them.

In the Understanding Chemical Reactions unit, pupils learned about how atoms rearrange during chemical reactions and the conservation of mass.

Calculations involving masses

A measure of how much matter is located in a particular volume

Match the following terms to their definitions.

Which of the following factors affect the volume of a gas?

At room temperature and pressure, 1 mole of any gas occupies a volume of {{}} dm³.

volume of gas = moles × molar gas volume

moles = volume of gas × molar gas volume

volume of gas = moles ÷ molar gas volume

moles = molar gas volume ÷ volume of gas

State the equation linking molar gas volume, moles and volume of gas.

Calculate the density of a gas with a mass of 0.060 g and a volume of 24 dm³. Give your answer in g/cm³.

Calculate the volume of 3.0 mol of hydrogen gas at room temperature and pressure. 

They are widely spaced and randomly arranged

They are randomly arranged and loose together

Use the particle model to describe how particles are arranged and behave in a gas.

State the equation linking mass, volume and density.

Calculate the volume of a cube with a side length of 2 cm. Give your answer in dm³.

This lesson will be removed by end of Summer Term 2025.

Gas volumes

Lesson outcome

This lesson will be removed by end of Summer Term 2025.