The mole | Combined science | Quizalize & Oak National Academy

Starter quiz

The relative atomic mass for this element is ______.

'63' ✓
Match each keyword to the correct description.

element

⇔

a substance made up of only one type of atom ✓

compound

⇔

two more or elements chemically bonded together ✓

ion

⇔

a particle with an electrical charge due to the gain/loss of electrons ✓

molecule

⇔

a particle consisting of two or more atoms joined by covalent bonds ✓

diatomic

⇔

two atoms chemically bonded together ✓
Which of the following formulae are for substances that contain ionic bonds?

SiO₂

CO₂

NaBr ✓

CH₄

Fe₂O₃ ✓
Which formulae indicate substances that are simple molecular in structure?

CaO

P₂O₅ ✓

LiF

H₂ ✓

H₂O ✓
The chemical formula for sodium bromide is ______.

'NaBr' ✓
The relative formula mass of magnesium chloride, MgCl₂, is ______.

'94' ✓

Which of the following is the correct value for Avogadro's constant?

6.02 × 10²²

6.02 × 10⁻²³

6.02 × 10⁻²²

6.02 × 10²³ ✓
Which of the following correctly shows the relationship between the number of particles, number of moles and Avogadro's constant (6.02 × 10²³)?

number of moles = (6.02 × 10²³) ÷ number of particles

number of moles = number of particles ÷ (6.02 × 10²³) ✓

number of moles = number of particles × (6.02 × 10²³)

number of moles = (6.02 × 10²³) ÷ number of particles
There are ______ moles in 5.42 × 10²³ particles of calcium carbonate. Give your answer to 3 significant figures.

'0.900' ✓
Match the chemical formula to the correct type of particle.

He

⇔

atom ✓

CH₄

⇔

molecule ✓

I₂

⇔

molecule ✓

KBr

⇔

formula unit ✓

AgCl

⇔

formula unit ✓

Fe

⇔

atom ✓
Match the values that have an equivalent number of particles.

0.5 mol

⇔

6 g of carbon ✓

46 g of sodium

⇔

62 g of phosphorus ✓

1.5 mol

⇔

30 g of neon ✓

27 g of beryllium

⇔

84 g silicon ✓

2.5 mol

⇔

35 g of nitrogen ✓
The mass of one atom of nickel is 9.75 × 10⁻²³ grams. What is the mass of 1.25 mol of nickel in grams? Give your answer to 3 s.f.

'73.4' ✓

Loading worksheet ...

Loading presentation ...

Chemical amounts are measured in moles (mol).
One mole of particles of a substance is defined as the Avogadro constant number of particles.
The number of particles (atoms, ions, molecules etc.) in one mole of a substance is always the same.
Use of Avogadro's number to calculate the number of particles of substance when number of moles is known and vice versa.
The mass of one mole of a monatomic element is equal to the relative atomic mass of that element measured in grams.

The number one mole represents can be difficult for pupils to grasp and appreciate.

Show many real world examples of 6.02 × 10²³ examples of something - that many basketballs would form a planet the size of the Earth.

Mole - A mole of something is 6.02 × 10²³ of it. The mass of a mole of a substance is its relative mass expressed in grams.
Relative formula mass - The relative formula mass (RFM) of a substance is the sum of the relative atomic masses of all the atoms in a formula.
Avogadro's constant - Avogadro's constant is the number of particles in one mole of a substance (6.02 × 10²³ mol⁻¹)