select the correct answer.\nthe compound diborane can be used as a rocket propellant. what is the percent…

select the correct answer.\nthe compound diborane can be used as a rocket propellant. what is the percent composition of boron in diborane (b₂h₆)?\na. 22%\nb. 25%\nc. 39%\nd. 75%\ne. 78%

select the correct answer.\nthe compound diborane can be used as a rocket propellant. what is the percent composition of boron in diborane (b₂h₆)?\na. 22%\nb. 25%\nc. 39%\nd. 75%\ne. 78%

Answer

Explanation:

Step1: Calculate the molar mass of boron in (B_2H_6)

The atomic mass of (B) is (10.81\space g/mol). In (B_2H_6), there are (2) (B) atoms. So the mass of (B) is (2\times10.81 = 21.62\space g/mol).

Step2: Calculate the molar mass of hydrogen in (B_2H_6)

The atomic mass of (H) is (1.008\space g/mol). In (B_2H_6), there are (6) (H) atoms. So the mass of (H) is (6\times1.008=6.048\space g/mol).

Step3: Calculate the molar mass of (B_2H_6)

The molar mass of (B_2H_6) is (21.62 + 6.048=27.668\space g/mol).

Step4: Calculate the percent composition of (B)

The percent composition of (B) is (\frac{21.62}{27.668}\times100%). [ \frac{21.62}{27.668}\times 100%=\frac{2162}{27.668}% \approx 78% ]

Answer:

E. (78%)