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Liquid benzene C(6)H(6)) burns in oxygen...

Liquid benzene `C_(6)H_(6))` burns in oxygen according to the equation, `2C_(6)H_(6)(l)+15O_(2)(g)to12CO_(2)(g)+6H_(2)O(g)`
How many litres of `O_(2)` at STP are needed to complete the combustion of 39 g of liquid benzene ? (Mol . Weight if `O_(2)=32,C_(6)H_(6)=78)`

A

11.2 litres

B

74 litres

C

84 litres

D

22.4 litres

Text Solution

Verified by Experts

The correct Answer is:
C
`2C_6H_6+15O_2rarr12CO_2+6H_2O`
`2xx78gmimplies15xx22.4` litre of `O_2` at STP
`39gmimplies(15xx22.4xx39)/(2.79)=84` litre
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