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Question bank·3.2 Use of amount of substance in relation to masses of pure substances

3.2 Use of amount of substance in relation to masses of pure substances

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Question 1

During a laboratory preparation, a sample of sodium hydrogencarbonate is heated until the reaction shown is complete.

$2NaHCO3→Na2CO3+H2O+CO22\text{NaHCO}_3 \rightarrow \text{Na}_2\text{CO}_3 + \text{H}_2\text{O} + \text{CO}_2$

Relative atomic masses ( $A_r$ ): $H=1\text{H} = 1$ , $C=12\text{C} = 12$ , $O=16\text{O} = 16$ , $Na=23\text{Na} = 23$

What mass of carbon dioxide is produced from 16.8 g of sodium hydrogencarbonate?

[1]

A

$Na=23\text{Na} = 23$

B

$g16.8\ \text{g}$

C

$g17.6\ \text{g}$

D

$g4.4\ \text{g}$

Markscheme

3.2 Use of amount of substance in relation to masses of pure substances Questions

GCSE
Chemistry
3.2 Use of amount of substance in relation to masses of pure substances

131 exam-style questions on AQA GCSE Chemistry 3.2 Use of amount of substance in relation to masses of pure substances, covering 3.2.1 Moles, 3.2.2 Amounts of substances in equations, 3.2.3 Using moles to balance equations, 3.2.4 Limiting reactants, 3.2.5a Concentration of solutions, and 3.2.5b Relating mass, volume and concentration. Each one has a worked solution and a mark scheme showing where the marks go.

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