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WAEC Chemistry 2024 Paper

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Question : 26

Total: 50

Ethane of volume 400 cm

^{3}

was completely burnt in excess oxygen according to the following equation:

200 cm $^{3}$
400 cm $^{3}$
600 cm $^{3}$
1200 cm $^{3}$

Solution:

2C $_{2}$ H $_{6}$ $_{(g)}$ + 7O $_{2}$ $_{(g)}$ → 6H $_{2}$ O $_{(g)}$ + 4CO $_{2}$ $_{(g)}$

2 moles 6 moles

400cm $^{3}$ X cm $^{3}$

X = $\; \frac{400 \times 6}{2}$

X = 1200cm $^{3}$

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