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CAIE IGCSE Chemistry 3.2.3 Reacting Masses in Simple Proportions Questions

Use balanced equations and relative formula masses to calculate reactant and product quantities.

Syllabus
2026–2028
Course
Chemistry 0620

Exam points

  • calculate reacting masses from balanced equations
  • use relative formula mass in stoichiometric calculations
  • determine product mass from a given reactant mass
  • deduce relative atomic mass from mass-change data
  • identify limiting and exact reacting quantities
  • apply mole and mass ratios to decomposition and combustion

CAIE IGCSE Chemistry 3.2.3 Reacting Masses in Simple Proportions Questions question 1

[Maximum number: 1]

Calcium carbonate, CaCO3\mathrm{CaCO}_{3}, reacts with dilute hydrochloric acid to produce carbon dioxide.
The equation for the reaction is shown. The relative formula mass of calcium carbonate is 100 .

CaCO3+2HCl→CaCl2+H2O+CO2\mathrm{CaCO}_{3}+2 \mathrm{HCl} \rightarrow \mathrm{CaCl}_{2}+\mathrm{H}_{2} \mathrm{O}+\mathrm{CO}_{2}

10 g of calcium carbonate is reacted with an excess of dilute hydrochloric acid.
Which mass of carbon dioxide is produced?

A

2.2 g2.2 \mathrm{~g}

B

2.8 g2.8 \mathrm{~g}

C

4.4 g4.4 \mathrm{~g}

D

44 g44 \mathrm{~g}

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