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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}_3Cr2​O3​, is reacted with 900 moles of aluminium (an excess).

Cr2O3+2Al→2Cr+Al2O3 \text{Cr}_2\text{O}_3 + 2\text{Al} \rightarrow 2\text{Cr} + \text{Al}_2\text{O}_3 Cr2​O3​+2Al→2Cr+Al2​O3​

Calculate the number of moles in 53 200 53\,200\,53200 grams of chromium(III) oxide.

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

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Calculations involving masses Questions

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