The number of hydrogen atoms present in `25.6 g` of sucrose `(C_12 H_22 O_11)` which has a molar mass of `342.3g` is :

Options

A. `22 xx 10^(23)`
B. `9.91 xx 10^(23)`
C. `11 xx 10^(23)`
D. `44 xx 10^(23)` H atoms

Answer

B

Explanation

No. of moles of sucrose ` = (25.6)/(342.3) = 0.075`
1 mole of sucrose contains ` 22 xx 6.023 xx 10^(23)` of H-atom 0.075 moles of sucrose contain
` = 0.075 xx 6.023 xx 10^(23) xx 22`
` = 9.91 xx 10^(23) ` of H - atoms.