1.

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:

Answer»

`22xx10^(23)`
`9.91xx10^(23)`
`11xx10^(23)`
`44xx10^(23)`

SOLUTION :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)`.


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