Question

Volume of h2 gas at stp bcl3 react with hydrogen

Answer 1

dear user .

....Volume of H2 at STP will be consumed in obtaining 21.6 g elemental boron from reduction of boron trichloride by hydrogen

2BCl3 + 3H2O → 2B + 3HCl

2 x 10.8 g B = 3 x 22.4 L H2

So, 21.6 g B = 3 x 22.4 x 21.6 / (2 x 10.8) = 67.2 L H2