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What volume of hydrogen gas at 273K and ...

What volume of hydrogen gas at 273K and 1 atm pressure will be consumed in obtaining 21.6 g of elemental boron (atomic mass = 10.8) from the reduction of boron trichloride by hydrogen ?

A

`89.6 L`

B

`67.2 L`

C

`44.8 L`

D

`22.4 L`

Text Solution

Verified by Experts

The correct Answer is:
B
`2BCl_(3) + 3H_(2) rarr 2B + 6HCl`
`2 xx 10.8 g B -= 3 xx 22.4 L` of `H_(2)`
`21.6 g B -= (3 xx 22.4 xx 21.6)/(2 xx 10.8) = 67.2 L` of `H_(2)`
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