Mole calculations quiz, Chemistry grades 9-10 (free)

Quick answer: The mole is the chemist's counting unit: one mole contains 6.02 × 10²³ particles, the Avogadro constant. This Chemistry 9-10 quiz checks mole calculations with 10 multiple-choice questions and instant feedback; every answer comes with a short explanation.

Mole calculations quiz for GCSE chemistry: 10 questions with answers

This mole calculations quiz for chemistry grades 9-10 has quick multiple-choice questions with instant feedback. Need a refresher first? Read the lesson or do the worksheet on mole calculations.

Choose the best answer for each of the ten questions. Wrong options come from typical mistakes, such as multiplying instead of dividing or using the atomic mass of one atom for a molecule. Read the explanation after each answer.

Level: Chemistry grades 9-10 (GCSE · IGCSE · O Level · Class 9-10) · Curriculum: HS-PS1-7, GCSE C3

Contents

Mole calculations quiz: the questions

What is the value of the Avogadro constant?

What is the molar mass of CO₂?

Which formula links mass, amount and molar mass?

How many moles are in 20 g of NaOH (M = 40 g/mol)?

What is the mass of 2.0 mol of water?

How many molecules are in 0.10 mol of carbon dioxide?

What is the relative formula mass of Ca(OH)₂ (Ca 40, O 16, H 1)?

Which sample has the most atoms: 12 g of C, Mg, Ca or Cu?

What is the molar mass of oxygen gas?

How many atoms are in 1.00 mol of water?

What is one mole? — 6.02 × 10²³ particles.

Formula for amount of substance? — n = m ÷ M

Unit of molar mass? — g/mol

Relative formula mass of H₂O? — 18

Molar mass of H₂ gas? — 2 g/mol

How do you get particles from moles? — Multiply by 6.02 × 10²³.

Mass of 2 mol of CaCO₃? — 200 g (M = 100 g/mol).

Moles in 44 g of CO₂? — 1.0 mol

What is the symbol for amount? — n, measured in mol.

Atoms in 1 mol of CO₂? — 1.81 × 10²⁴

Mole calculations quiz for GCSE chemistry: 10 questions with answers

Mole calculations quiz: the questions