What volume of water will be produced at room temperature and pressure when 2g of hydrogen is burnt in air?

Hydrogen gas reached with nitrogen gas to form ammonia by Haber process. Calculate the volume of ammonia produced of 2dm³ of nitrogen reacted with 4dm³ of hydrogen gas at S.T.P.

15g of potassium chlorate decompose on heating to yield crystalline of potassium chloride and the air.
Calculate;
i. Mass of potassium chloride produced.
ii. Volume of air formed at S.T.P
iii. Moles of air formed.

12g of hydrogen peroxide catalyzed to yield water and oxygen air at S.T.P.
Find;
i. The volume of water formed.
ii. The volume of oxygen formed.

20g of carbonate was decomposed on heat to give quicklime and carbon dioxide gas.
Calculate;
i. Mass of quicklime produced.
ii. Volume of carbon dioxide formed at S.T.P

1dm³ of hydrogen reacted with chlorine gas to form hydrogen chloride gas at S.T.P Calculate;
i. The volume of hydrogen chloride formed.
ii. The mole of hydrogen chloride formed.

200 cm³ of sulphuric acid reacted with Barium nitrate to form nitric acid and barium sulphate solid at S.T.P. Work out;
i. Mass of Barium sulphate formed.
ii. Moles of Barium sulphate formed.

8 moles oxygen gas reacted with 5 moles of hydrogen gat to form water. Calculate volume of water formed at S.T.P

Hydrochloric acid reacted 200cm3 of sodium thiosulphate at S.T.P Calculate mass of Sulphur formed.

5 litres of Sulphur dioxide was burnt to produced Sulphur trioxide gas at S.T.P. Calculate;
i. Moles of Sulphur trioxide formed.
ii. Volume of Sulphur trioxide formed.