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Monitoring chemical reactions

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Question 15

Calcium reacts with oxygen. Calcium oxide is made.

The balanced symbol equation is shown.

2\text{Ca} + \text{O}_2 \rightarrow 2\text{CaO}

Calculate how much calcium is needed to make 14.0 g of calcium oxide. (Relative atomic masses: $Ca=40\text{Ca} = 40$ , $O=16\text{O} = 16$ )

$g5.0\text{ g}$

$g10.0\text{ g}$

$g14.0\text{ g}$

$g19.6\text{ g}$

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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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31

Question 15

Calcium reacts with oxygen. Calcium oxide is made.

The balanced symbol equation is shown.

2\text{Ca} + \text{O}_2 \rightarrow 2\text{CaO}

Calculate how much calcium is needed to make 14.0 g of calcium oxide. (Relative atomic masses: $Ca=40\text{Ca} = 40$ , $O=16\text{O} = 16$ )

$g5.0\text{ g}$

$g10.0\text{ g}$

$g14.0\text{ g}$

$g19.6\text{ g}$

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.