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3.5 Use of amount of substance in relation to volumes of gases

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Question 5

A student adds some magnesium carbonate, MgCO3\text{MgCO}_3MgCO3​, to dilute nitric acid. The acid is in excess, so all of the magnesium carbonate reacts.

MgCO3+2HNO3→Mg(NO3)2+H2O+CO2\text{MgCO}_3 + 2\text{HNO}_3 \rightarrow \text{Mg(NO}_3\text{)}_2 + \text{H}_2\text{O} + \text{CO}_2MgCO3​+2HNO3​→Mg(NO3​)2​+H2​O+CO2​

The student collects 360 cm3 of carbon dioxide, measured at room temperature and pressure.

The relative formula mass of MgCO3\text{MgCO}_3MgCO3​ is 84. The volume of one mole of any gas at room temperature and pressure is 24 dm3.

What mass of magnesium carbonate reacted?

[1]
A

1.26 g1.26\ \text{g}1.26 g

B

2.52 g2.52\ \text{g}2.52 g

C

0.66 g0.66\ \text{g}0.66 g

D

30.2 g30.2\ \text{g}30.2 g

Markscheme

3.5 Use of amount of substance in relation to volumes of gases Questions

  1. GCSE
  2. /Chemistry
  3. /3.5 Use of amount of substance in relation to volumes of gases

100 exam-style questions on AQA GCSE Chemistry 3.5 Use of amount of substance in relation to volumes of gases, covering 3.5.1 Volumes of gases. Each one has a worked solution and a mark scheme showing where the marks go.

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