Define the term relative atomic mass (Aᵣ).

[2 marks]

Which isotope is used as the standard for relative atomic mass measurements?

[1 mark]

Define the term relative molecular mass (Mᵣ).

[1 mark]

Explain why the relative atomic mass of chlorine (35.5) is not a whole number.

[2 marks]

State the difference between relative molecular mass (Mᵣ) and relative formula mass.

[2 marks]

Calculate the relative molecular mass (Mᵣ) of water (H₂O).

[1 mark]

Calculate the relative molecular mass (Mᵣ) of ethanol (C₂H₅OH).

[2 marks]

Calculate the relative molecular mass (Mᵣ) of sulfuric acid (H₂SO₄).

[2 marks]

Calculate the relative formula mass of calcium carbonate (CaCO₃).

(Relative atomic masses: Ca = 40, C = 12, O = 16)

[2 marks]

Calculate the relative molecular mass (Mᵣ) of ammonia (NH₃).

[1 mark]

Calculate the relative formula mass of aluminium sulfate (Al₂(SO₄)₃).

(Relative atomic masses: Al = 27, S = 32, O = 16)

[3 marks]

Calculate the relative formula mass of calcium hydroxide (Ca(OH)₂).

(Relative atomic masses: Ca = 40, O = 16, H = 1)

[2 marks]

Calculate the relative formula mass of magnesium nitrate (Mg(NO₃)₂).

(Relative atomic masses: Mg = 24, N = 14, O = 16)

[3 marks]

Calculate the relative formula mass of ammonium sulfate ((NH₄)₂SO₄).

(Relative atomic masses: N = 14, H = 1, S = 32, O = 16)

[3 marks]

A compound has the formula Fe₂(SO₄)₃. Calculate its relative formula mass.

(Relative atomic masses: Fe = 56, S = 32, O = 16)

[3 marks]