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Monitoring chemical reactions

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Question 4

Calcium carbonate, $CaCO3\text{CaCO}_3$ , decomposes on heating to produce calcium oxide, $CaO\text{CaO}$ , and carbon dioxide, $CO2\text{CO}_2$ .

\text{CaCO}_3 \longrightarrow \text{CaO} + \text{CO}_2

What is the atom economy for the production of calcium oxide ( $CaO\text{CaO}$ ) in this reaction?

( $M_r$ : $CaCO3=100\text{CaCO}_3 = 100$ , $CaO=56\text{CaO} = 56$ , $CO2=44\text{CO}_2 = 44$ )

$44%44\%$

$56%56\%$

$78%78\%$

$100%100\%$

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

Question bank

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 4

Calcium carbonate, $CaCO3\text{CaCO}_3$ , decomposes on heating to produce calcium oxide, $CaO\text{CaO}$ , and carbon dioxide, $CO2\text{CO}_2$ .

\text{CaCO}_3 \longrightarrow \text{CaO} + \text{CO}_2

What is the atom economy for the production of calcium oxide ( $CaO\text{CaO}$ ) in this reaction?

( $M_r$ : $CaCO3=100\text{CaCO}_3 = 100$ , $CaO=56\text{CaO} = 56$ , $CO2=44\text{CO}_2 = 44$ )

$44%44\%$

$56%56\%$

$78%78\%$

$100%100\%$

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.