Questions 1. On analysis, a compound was found to contain 11.64 g of sodium, 16.20 g of sulfur and 12.15 g of oxygen. Determine the empirical formula of the compound.

2. A liquid used in a rocket fuel is found to consist of 3.04 g of nitrogen and 6.94 g of oxygen. The molar mass of the compound is 92 g mol-1. Determine the molecular formula of the compound.

3. Calculate the percentage composition of hydrogen, sulfur and oxygen in sulphuric acid, H2SO4.

4. Determine the percentage, by mass, of carbon in aluminium carbonate, Al2(CO3)3.

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