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Amount of substance

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Question 33

The equation for the reaction between magnesium and hydrochloric acid is

\text{Mg} + 2\text{HCl} \rightarrow \text{MgCl}_2 + \text{H}_2

What is the minimum mass, in $mg\text{mg}$ , of magnesium ( $Ar=24.3A_{\text{r}} = 24.3$ ) needed to react with 75.0 cm³ of 1.20 mol dm^-3 hydrochloric acid?

$1.09$

$2.19$

$1.09 \times 10^3$

$2.19 \times 10^3$

Markscheme

Amount of substance Questions

A Level
Chemistry
Amount of substance

79 exam-style questions on AQA A Level Chemistry Amount of substance, covering Relative atomic mass and relative molecular mass, The mole and the Avogadro constant, The ideal gas equation, Empirical and molecular formula, and Balanced equations and associated calculations. Each one has a worked solution and a mark scheme showing where the marks go.

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