Please solve q 120?

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1 Answer
Narad T.
May 2, 2018

The correct answer is #option (2)#

Explanation:

The mole fraction is

#X_(H_2O)=("moles of " H_2 O) /(("moles of " H_2 O)+("moles of " H_2 O_2))#

#20g# of #H_2O_2# is present in #80g# of #H_2O#

Number of moles of #H_2O_2=20/34=0.588#

Number of moles of #H_2O=80/18=4.444#

Therefore,

#X_(H_2O)=4.444/(0.588+4.444)=0.88=68/77#

The correct answer is #option (2)#

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