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

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

A

22.4 L

B

89.6 L

C

67.2 L

D

44.8 L

Text Solution

Verified by Experts

The correct Answer is:
C
`BCl_(3)+3[H] rarr B+3HCl`
`BCl_(3)+3/2 H_(2) rarr B+3 HCl, B=216/10.8=2` mole
`B equiv 3/2 H_(2)`
I mole `equiv 3/2` mole, 2 mole `equiv 3` mole
`V=3xx22.4=67.2 L`.
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