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Introducing chemical reactions

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Question 11

What is the correct balanced equation for the combustion of octane, $C8H18\text{C}_8\text{H}_{18}$ ?

$C8H18+17O2→8CO2+9H2O\text{C}_8\text{H}_{18} + 17\text{O}_2 \rightarrow 8\text{CO}_2 + 9\text{H}_2\text{O}$

$C8H18+8O2→8CO2+9H2O\text{C}_8\text{H}_{18} + 8\text{O}_2 \rightarrow 8\text{CO}_2 + 9\text{H}_2\text{O}$

$2C8H18+25O2→16CO2+18H2O2\text{C}_8\text{H}_{18} + 25\text{O}_2 \rightarrow 16\text{CO}_2 + 18\text{H}_2\text{O}$

$2C8H18+34O2→16CO2+18H2O2\text{C}_8\text{H}_{18} + 34\text{O}_2 \rightarrow 16\text{CO}_2 + 18\text{H}_2\text{O}$

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Introducing chemical reactions Questions

GCSE
Chemistry
Introducing chemical reactions

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

Introducing chemical reactions

Question bank

Introducing chemical reactions

Easy Medium Hard

1 2 3 4 5 6 7 8 9 10 11 12

Question 11

What is the correct balanced equation for the combustion of octane, $C8H18\text{C}_8\text{H}_{18}$ ?

$C8H18+17O2→8CO2+9H2O\text{C}_8\text{H}_{18} + 17\text{O}_2 \rightarrow 8\text{CO}_2 + 9\text{H}_2\text{O}$

$C8H18+8O2→8CO2+9H2O\text{C}_8\text{H}_{18} + 8\text{O}_2 \rightarrow 8\text{CO}_2 + 9\text{H}_2\text{O}$

$2C8H18+25O2→16CO2+18H2O2\text{C}_8\text{H}_{18} + 25\text{O}_2 \rightarrow 16\text{CO}_2 + 18\text{H}_2\text{O}$

$2C8H18+34O2→16CO2+18H2O2\text{C}_8\text{H}_{18} + 34\text{O}_2 \rightarrow 16\text{CO}_2 + 18\text{H}_2\text{O}$

Markscheme

Introducing chemical reactions Questions

GCSE
Chemistry
Introducing chemical reactions

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