Question

24.
Combution of 2 24 Its ethane at STP requires
a) 7.84 L of oxygen
b) 0.35 moles of oxygen
c) 11.2 grams of oxygen d) all the above
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Answer 1

Answer:

7.84 litres of O2

Explanation:

2 mole of ethane requires 7 moles of oxygen for complete combustion.

Followed from Avogadro’s law that 2 volumes of ethane need 7 volumes of oxygen for complete combustion. That means 2 litres of ethane consume 7 litres of oxygen for complete combustion.

Here 2.21 litre of ethane requires 0.3 mole of oxygen for complete combustion.  

That means 2.21 litre of ethane requires 7.84 litres of oxygen