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Question

NO reacts with O2 to form NO2 when 10 g of NO2 is formed during the reaction, the mass of O2 consumed is:

A
1.90 g
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B
5.0 g
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C
3.48 g
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D
13.9 g
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Solution

The correct option is D 3.48 g
NO+12O2NO2

By stiochiometry, 0.5 moles of O2 is consumed to form 1 mole of NO2

Moles of NO2 formed=1046=0.217 moles
Moles of O2 consumed=0.5×0.217
=0.1087 moles
Mass of O2 consumed=0.1087×32
=3.48g

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