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WorksheetsIGCSE Stoichiometry Quiz
Total questions: 20
Worksheet time: 10mins
The equation shows the reaction between magnesium and sulfuric acid.
[Ar: H, 1; O, 16; Mg, 24; S, 32]
Mg + H2SO4 → MgSO4 + H2
In this reaction, which mass of magnesium sulfate is formed when 6 g of magnesium react with excess sulfuric acid?
A 8
B 24
C 30
D 60
Two atoms of magnesium, Mg, react with one molecule of oxygen, O2.
What is the formula of the product?
A MgO
B MgO2
C Mg2O
D Mg2O2
Copper(II) oxide reacts with ammonia.
The left hand side of the balanced equation for this reaction is:
3CuO + 2NH3 →
What completes the equation?
A 3Cu + 2HNO3
B 3Cu + 2N + 3H2O
C 3Cu + N2 + 3H2O
D 3Cu + 2NO + 3H2O
What is the relative formula mass, Mr, of CaCO3?
A 50
B 68
C 100
D 204
A molecule, Z, contains two atoms of oxygen, six atoms of hydrogen and three atoms of carbon.
What is the formula of Z?
A CH3CH2CHO
B CH3COCH3
C C2H5CO2H
D C3H6CO2H
Iron forms an oxide with the formula Fe2O3.
What is the relative formula mass of this compound?
A 76
B 100
C 136
D 160
In athletics, banned drugs such as nandrolone have been taken illegally to improve performance.
Nandrolone has the molecular formula C18H26O2.
What is the relative molecular mass, Mr, of nandrolone?
(Relative atomic mass: H = 1; C = 12; O = 16)
A 46
B 150
C 274
D 306
The structure of an organic compound, X, is shown.
What is the molecular formula of X?
A C6H9
B C6H12
C C7H12
D C7H14
What is the relative molecular mass, Mr, of nitrogen dioxide?
A 15
B 23
C 30
D 46
A compound contains one atom of calcium, two atoms of hydrogen and two atoms of oxygen.
What is the correct chemical formula of the compound?
A CaO2H2
B HOCaOH
C H2CaO2
D Ca(OH)2
The formulae of compounds W, X and Y are shown.
W CuSO4.5H2O
X MgSO4.7H2O
Y Cu(NO3)2.6H2O
Which statement is correct?
A W contains twice as many hydrogen atoms as oxygen atoms.
B X contains the most oxygen atoms
C Y contains the most hydrogen atoms.
D Y contains the same number of hydrogen and oxygen atoms.
Which relative molecular mass, Mr, is not correct for the molecule given?
A
B
C
D
A compound with the formula XF2 has a relative formula mass of 78.
What is element X?
A argon
B calcium
C neon
D zirconium
What is the balanced chemical equation for the reaction between calcium and water?
A Ca + H2O → CaOH + H2
B Ca + H2O → Ca(OH)2 + H2
Ca + 2H2O → CaOH + H2
D Ca + 2H2O → Ca(OH)2 + H2
he equation shows the reaction between magnesium and sulfuric acid.
Mg + H2SO4 → MgSO4 + H2
(Mg = 24, H = 1, S = 32, O = 16)
In this reaction, what mass of magnesium sulfate will be formed when 6 g of magnesium reacts with excess sulfuric acid?
A 8
B 24
C 30
D 60
A compound has the formula CH3CO2H.
How should the relative molecular mass, Mr, of this compound be calculated?
A 12 + 1 + 16
B 3(12 + 1) + 2(12 + 16) + 1
C (4 × 12) + (2 × 1) + 16
D (2 × 12) + (4 × 1) + (2 × 16)
The equation for the reaction between magnesium and dilute sulfuric acid is shown.
Mg + H2SO4 → MgSO4 + H2
Mr of MgSO4 is 120
Which mass of magnesium sulfate will be formed if 12 g of magnesium are reacted with sulfuric
acid?
A 5 g
B 10 g
C 60 g
D 120 g
Methane, CH4, burns in the air to form carbon dioxide and water.
What is the balanced equation for this reaction?
A CH4(g) + O2(g) → CO2(g) + 2H2O(g)
B CH4(g) + 2O2(g) → CO2(g) + 2H2O(g)
C CH4(g) + 2O2(g) → CO2(g) + H2O(g)
D CH4(g) + 3O2(g) → CO2(g) + 2H2O(g)
The relative formula mass, Mr, of copper(II) sulfate, CuSO4, is 160.
Which mass of sulfur is present in 160 g of copper(II)sulfate?
A 16 g
B 32 g
C 64 g
D 128 g
What is the relative molecular mass (Mr) of HNO3?
A 5
B 31
C 32
D 63
