The number of hydrogen atoms present in 25.6 g of sucrose `(C_(12)H_(22)O_(11))` which has a molar mass of 342.3 g is:

Options

A. `22xx10^(23)`
B. `9.91xx10^(23)`
C. `11xx10^(23)`
D. `44xx10^(23)`

Answer

B

Explanation

Number of moles of sucrose
`=("Mass")/("Molar mass")=(25.6)/(342.3)`
Number of moles of hydrogen atom `=0.075xx22`
Number of atoms of hydrogen `=0.075xx22xx6.023xx10^(23)`
`=9.9xx10^(23)`.