An amount of of a gaseous compound of boron and hydrogen occupies at and at . The compound is: (At. — States of Matter and Gaseous State Chemistry Question

💡 Solution & Explanation

Molar mass $M = wRT/PV = (1.00 \times 0.082 \times 303) / (1.00 \times 0.820) = 30.3\text{ g/mol}$. The molar mass of $B_2H_6$ is $(2 \times 10.8) + 6 = 27.6\text{ g/mol}$, which is the closest valid borane.