How much iron sulphide (FeS) do you get from sulphur reacting with 56g of iron?
(Mr: Fe = 56, S = 32)
Fe + S → FeS
Hydrogen reacts with oxygen to form water. What mass of water can be made from 8g of hydrogen?
(Mr: H = 1, O = 16)
2H2 + O2 → 2H2O
Carbon burns in air to form carbon dioxide. What mass of carbon is needed to make 22g of carbon dioxide?
(Mr: C = 12, O = 16)
C + O2 → CO2
Use the chemical equation to find the mass of carbon which reacts with 223g of lead oxide. (Mr: Pb = 207, C = 12, O = 16)
2PbO + C → 2Pb + CO2
When sulphur burns, it forms sulphur dioxide. Calculate the mass of sulphur dioxide which would be obtained from 160 tonnes of sulphur. (Mr: S = 32, O = 16)
S + O2 → SO2
To make ammonium nitrate fertiliser, ammonia(NH3) is reacted with nitric acid.(HNO3) Calculate the mass of nitric acid needed to make 400 tonnes of ammonium nitrate (NH4NO3).
(Mr: N = 14, H = 1, O = 16)
NH3 + HNO3 → NH4NO3
Calcium carbonate decomposes on heating to give calcium oxide and carbon dioxide. (Mr: Ca = 40, C = 12, O = 16)
a. What mass of CaO can be made from 25g of CaCO3?
b. What mass of CaCO3 would be needed to form 11g of CO2?
CaCO3 → CaO + CO2
The reaction between magnesium carbonate and hydrochloric acid produces magnesium chloride, water and carbon dioxide. (Mr: Mg = 24, C = 12, O = 16, Cl = 35.5)
What mass of magnesium chloride would you expect to get from 8.4g of magnesium carbonate?
MgCO3 + 2HCl → MgCl2 + H2O + CO2
9. The balanced symbol equation for the reaction between ammonia and sulphuric acid is
How many tonnes of sulphuric acid are needed to exactly neutralise 340 tonnes of ammonia? (Mr: N = 14, H = 1, O = 16, S = 32)
2NH3 + H2SO4 → (NH4)2SO4
Uranium metal is produced from uranium fluoride using magnesium.
What mass of uranium would be produced from 34.9g of uranium fluoride? (Mr: U = 235, F = 19)
UF6 + 3Mg → 3MgF2 + U