How much iron sulphide (FeS) do you get from sulphur reacting with 56g of iron?
(Mr: Fe = 56, S = 32)
Fe + S → FeS
Question 2
2.
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
Question 3
3.
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
Question 4
4.
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
Question 5
5.
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
Question 6
6.
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
Question 7
7.
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
Question 8
8.
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
Question 9
9.
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
Question 10
10.
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)