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Monitoring chemical reactions

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Question 4

In an industrial chemical process, the thermal decomposition of strontium carbonate is monitored and controlled to produce a targeted mass of strontium oxide according to the following equation:

\text{SrCO}_3 \rightarrow \text{SrO} + \text{CO}_2

Calculate the mass of strontium carbonate needed to make $g425\text{ g}$ of strontium oxide.

( $A_r$ : $Sr=87.6\text{Sr} = 87.6$ , $C=12.0\text{C} = 12.0$ , $O=16.0\text{O} = 16.0$ )

Give your answer to 3 significant figures.

[4]

Markscheme

Monitoring chemical reactions Questions

GCSE
Chemistry
Monitoring chemical reactions

91 exam-style questions on OCR GCSE Chemistry Monitoring chemical reactions. Each one has a worked solution and a mark scheme showing where the marks go.

Monitoring chemical reactions

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Monitoring chemical reactions

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Question 4

In an industrial chemical process, the thermal decomposition of strontium carbonate is monitored and controlled to produce a targeted mass of strontium oxide according to the following equation:

\text{SrCO}_3 \rightarrow \text{SrO} + \text{CO}_2

Calculate the mass of strontium carbonate needed to make $g425\text{ g}$ of strontium oxide.

( $A_r$ : $Sr=87.6\text{Sr} = 87.6$ , $C=12.0\text{C} = 12.0$ , $O=16.0\text{O} = 16.0$ )

Give your answer to 3 significant figures.

[4]

Markscheme

Monitoring chemical reactions Questions

GCSE
Chemistry
Monitoring chemical reactions

91 exam-style questions on OCR GCSE Chemistry Monitoring chemical reactions. Each one has a worked solution and a mark scheme showing where the marks go.