the compound diborane can be used as a rocket propellant. what is the percent composition of boron in…

Explanation:

Step 1: Calcular la masa molar de B₂H₆

La masa atómica de B es 10.81 g/mol y la de H es 1.008 g/mol. Para B₂H₆: Masa molar de B₂ = 2×10.81 = 21.62 g/mol Masa molar de H₆ = 6×1.008 = 6.048 g/mol Masa molar total de B₂H₆ = 21.62 + 6.048 = 27.668 g/mol

Step 2: Calcular el porcentaje de B

Porcentaje de B = ($\frac{\text{Masa de B en B₂H₆}}{\text{Masa molar de B₂H₆}}$)×100 = ($\frac{21.62}{27.668}$)×100 ≈ 78%

Answer:

E. 78%