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chemistry igcse acapprinted 22 · PDF 22
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2. Which of the following is the correct ratio of moles when magnesium reacts with
hydrochloric acid to produce magnesium chloride and hydrogen gas?
A) 1:1
B) 1:2
C) 2:1
D) 1:3
3. What is the number of moles of carbon dioxide produced when 44 g of carbon dioxide
is formed from the complete combustion of carbon?
(Relative atomic mass: C = 12, O = 16)
A) 0.5 mol
B) 1 mol
C) 2 mol
D) 0.25 mol
4. 50 cm³ of 0.5 mol/dm³ hydrochloric acid reacts completely with 25 cm³ of sodium
hydroxide. What is the concentration of the sodium hydroxide solution?
A) 0.5 mol/dm³
B) 1 mol/dm³
C) 2 mol/dm³
D) 0.25 mol/dm³
5. How many moles of sodium ions are present in 58.5 g of sodium chloride?
A) 0.5 mol
B) 1 mol
C) 2 mol
D) 0.25 mol