Skip to content

Course home

Sign up

2.6 Calculations involving masses

EasyMediumHard
12345678910111213141516171819202122
Question 9
H

Dry ice is solid carbon dioxide, CO2\mathrm{CO_{2}}CO2​. It is used to keep food cold during transport.

Relative atomic masses: C = 12, O = 16, Mg = 24

The Avogadro constant = 6.02 × 1023 per mole

a.

State the number of molecules in one mole of carbon dioxide.

[1]
b.

Calculate the number of moles of carbon dioxide in 4.40 g of dry ice.

[2]
c.

Calculate the number of oxygen atoms in 4.40 g of carbon dioxide.

[2]
d.

Calculate the mass of 3.01 × 1023 atoms of magnesium.

[2]
e.

One mole of carbon dioxide and one mole of water contain the same number of molecules. Explain why one mole of carbon dioxide has a greater mass than one mole of water.

[1]
Markscheme

2.6 Calculations involving masses Questions

  1. GCSE
  2. /Chemistry
  3. /2.6 Calculations involving masses

55 exam-style questions on Edexcel GCSE Chemistry 2.6 Calculations involving masses, covering 2.6.1 Relative formula mass and percentage composition, 2.6.2 Empirical and molecular formulae, 2.6.3 Conservation of mass, 2.6.4 Reacting masses and concentration in g dm⁻³, 2.6.5 The mole and the Avogadro constant, and 2.6.6 Limiting reactants and stoichiometry. Each one has a worked solution and a mark scheme showing where the marks go.

Question bank