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Question

What is the weight of oxygen that is required for the complete combustion of 2.8 kg of ethylene ?


A
9.6 kg
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B
96.0 kg
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C
6.4 kg
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D
2.8 kg
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Solution

The correct option is A 9.6 kg
$$\underset{(12\times 2 +4)}{C_2H_4} + \underset{96 \, kg}{3O_2} \rightarrow 2CO_2 + 2H_2$$

$$= 28 kg$$

$$\because$$ 
Weight of oxygen required for the Complete combustion of 28 kg ethylene = 96 kg 

$$\because$$ Weight of oxygen required for the combustion of 2.8 kg ethylene.

$$=\dfrac {96 \times 2.8}{28}= 9.6 \, kg$$

Hence, the correct option is $$A$$

Chemistry

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