CF C3 Calculations

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

Relative atomic masses (Ar): H = 1 O = 16 S = 32

Calculate the percentage by mass of oxygen in lithium sulfate (Li2SO4).

Relative atomic mass (Ar): O = 16

Relative formula mass (Mr): Li2SO4 = 110

Give your answer to 2 significant figures.

A solution of lithium sulfate contains 0.30 g of lithium sulfate in 25 cm3.

Calculate the concentration of lithium sulfate in g/dm3.

hydrochloric acid + sodium hydroxide → sodium chloride + water

In the reaction, 3.65 g of hydrogen chloride reacts with 4.00 g of sodium hydroxide. 1.80 g of water is produced.

Calculate the mass of the other product.

Calculate the relative formula mass (Mr) of magnesium fluoride (MgF2).

Relative atomic masses (Ar): F = 19 Mg = 24

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The potassium sulfate solution has 0.86 g of potassium sulfate dissolved in 25 cm3 of water.

Calculate the mass of potassium sulfate needed to make 1.0 dm3 of solution.

Magnesium reacts with oxygen to produce magnesium oxide.

Calculate the percentage mass of magnesium in magnesium oxide (MgO).

Relative atomic mass (Ar): Mg = 24

Relative formula mass (Mr): MgO = 40

Answer: _____ %

500 cm3 of copper chloride solution contains 6.50 g of copper chloride.

Calculate the mass of copper chloride in 40.0 cm3 of this copper chloride solution.

Calculate the relative formula mass (Mr) of sodium hydroxide (NaOH).

Relative atomic masses (Ar): H = 1 O = 16 Na = 23