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Calculations involving masses

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Question 35

In an industrial thermite process, pure chromium(III) oxide, $Cr2O3\text{Cr}_2\text{O}_3$ , is reacted with 900 moles of aluminium (an excess).

\text{Cr}_2\text{O}_3 + 2\text{Al} \rightarrow 2\text{Cr} + \text{Al}_2\text{O}_3

Calculate the number of moles in $53\,200\,$ grams of chromium(III) oxide.

Relative atomic masses ( $A_r$ ): $O=16.0\text{O} = 16.0$ , $Cr=52.0\text{Cr} = 52.0$

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Calculations involving masses Questions

GCSE
Chemistry
Calculations involving masses

258 exam-style questions on Edexcel GCSE Chemistry Calculations involving masses. Each one has a worked solution and a mark scheme showing where the marks go.

Calculations involving masses

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Calculations involving masses

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Question 35

In an industrial thermite process, pure chromium(III) oxide, $Cr2O3\text{Cr}_2\text{O}_3$ , is reacted with 900 moles of aluminium (an excess).

\text{Cr}_2\text{O}_3 + 2\text{Al} \rightarrow 2\text{Cr} + \text{Al}_2\text{O}_3

Calculate the number of moles in $53\,200\,$ grams of chromium(III) oxide.

Relative atomic masses ( $A_r$ ): $O=16.0\text{O} = 16.0$ , $Cr=52.0\text{Cr} = 52.0$

[2]

Markscheme

Calculations involving masses Questions

GCSE
Chemistry
Calculations involving masses

258 exam-style questions on Edexcel GCSE Chemistry Calculations involving masses. Each one has a worked solution and a mark scheme showing where the marks go.