How many grams of oxygen are required for complete combustion of 2 moles of benz

Question

How many grams of oxygen are required for complete combustion of 2 moles of benzene?

Options:

A . 450g

B . 480g

C . 500g

D . 530g

Answer: Option B
:
B
The balanced reaction for combustion of benzene is

2 C_{6} H_{6} + 15 O_{2} \to

12 C O_{2} + 6 H_{2} O

Therefore, 15 moles of oxygen gas is required for complete combustion of benzene.
We know that,

1 m o l e

O_{2}

32 g

∴

15 m o l e s

O_{2}

15 \times 32

480 g

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