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Improving processes and products

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Question 48

Calcium carbonate, $CaCO3\text{CaCO}_3$ , decomposes when heated.

Calcium oxide, $CaO\text{CaO}$ , is made. Carbon dioxide is a waste product.

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

What is the atom economy of the reaction to produce calcium oxide?

Relative formula mass ( $M_r$ ): $CaCO3=100.1\text{CaCO}_3 = 100.1$ , $CaO=56.1\text{CaO} = 56.1$ , $CO2=44.0\text{CO}_2 = 44.0$

$44.0%44.0\%$

$56.0%56.0\%$

$78.4%78.4\%$

$178.4%178.4\%$

Markscheme

Improving processes and products Questions

GCSE
Chemistry
Improving processes and products

81 exam-style questions on OCR GCSE Chemistry Improving processes and products. Each one has a worked solution and a mark scheme showing where the marks go.

Improving processes and products

Question bank

Improving processes and products

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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 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48

Question 48

Calcium carbonate, $CaCO3\text{CaCO}_3$ , decomposes when heated.

Calcium oxide, $CaO\text{CaO}$ , is made. Carbon dioxide is a waste product.

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

What is the atom economy of the reaction to produce calcium oxide?

Relative formula mass ( $M_r$ ): $CaCO3=100.1\text{CaCO}_3 = 100.1$ , $CaO=56.1\text{CaO} = 56.1$ , $CO2=44.0\text{CO}_2 = 44.0$

$44.0%44.0\%$

$56.0%56.0\%$

$78.4%78.4\%$

$178.4%178.4\%$

Markscheme

Improving processes and products Questions

GCSE
Chemistry
Improving processes and products

81 exam-style questions on OCR GCSE Chemistry Improving processes and products. Each one has a worked solution and a mark scheme showing where the marks go.