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 (RAM 1 d.p.)

Chemistry

Three types of chemical reaction

Conservation of mass

Balancing equations

The mole (RAM 1 d.p.)

Moles and masses (RAM 1 d.p.)

Uncertainties in measurements: chemistry

Representations of a mole (RAM 1 d.p.)

Mass in a chemical reaction: using moles (RAM 1 d.p.)

Limiting reactants (RAM 1 d.p.)

Determining an equation from given values (RAM 1 d.p.)

Determining an equation experimentally: magnesium oxide (RAM 1 d.p.)

Determining an equation experimentally: sodium hydrogencarbonate (RAM 1 d.p.)

Converting between mass and volume using moles (RAM 1 d.p.)

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.

This unit covers writing chemical formulae, balancing equations, and using the conservation of mass. It includes calculating moles, empirical formulae, relative formula masses, and theoretical yields. Emphasis is on stoichiometry, concentration, gas volumes, and using standard form.

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.

Starter Quiz

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