Been stuck on this for ages, and its due in tomorrow haha, any help?
Calcium carbonate breaks down on heating to produce calcium oxide and carbon dioxide gas. CaCO3 CaO CO2
A student heats 15 g of calcium carbonate strongly in a crucible.
Relative atomic masses (Ar): Ca 40, C 12, O 16.
a Calculate the number of moles in 15 g of calcium carbonate. (2 marks)
b Use your answer to part a to determine the number of moles of calcium oxide that will be produced. (1 mark)
c Calculate the mass of calcium oxide produced by this reaction. (2 marks)
4 A student is preparing a sample of sodium nitrate, NaNO3. She mixes 17 g of sodium oxide with an excess of nitric acid.
The equation for the reaction is: Na2O 2HNO3 2NaNO3 H2O
Relative atomic masses (Ar): Na 23, O 16, N 14, H 1.
a Calculate the number of moles in 17 g of sodium oxide. (2 marks)
b Calculate the maximum mass of sodium nitrate that can be produced in this reaction. (3 marks)
5 Aluminium and iron oxide (Fe2O3) react together to produce aluminium oxide (Al2O3).
The equation for the reaction is: 2Al Fe2O3 Al2O3 2Fe
Relative atomic masses (Ar): Al 27, O 16, Fe 56.
Calculate the mass of iron that is produced by reacting 20 g of iron oxide with an excess of aluminium.