Chapter 12, Problem 23P

Interpretation Introduction

Interpretation:

The total number of hydrogen present in the alkane in tobacco leaves having 31 carbon atoms must be calculated.

Concept introduction:

Alkanes are saturated hydrocarbon, that is, there is only one single bond between carbon and hydrogen atoms, with the general formula ${\text{C}}_{\text{n}}{\text{H}}_{\text{2n+2}}$.

Answer to Problem 23P

A number of hydrogen in the straight-chain alkane present in tobacco leaves is 64.

Explanation of Solution

As per the general formula of a straight-chain alkane is ${\text{C}}_{\text{n}}{\text{H}}_{\text{2n+2}}$ , number of hydrogen will be $\text{2n+2}$ where n is the number of carbon present in the alkane.

Substituting the value of n as 31 in the formula:

Thus, the number of hydrogen present $\text{=2n+2=(2×31)+2=62+2=64}$.

Conclusion

The number of hydrogen in the alkane is 64.