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Chemistry Question on Mole concept and Molar Masses

A 1.84 mg sample of polyhydric alcoholic compound 'X' of molar mass 92.0 g/mol gave 1.344 mL of H2 gas at STP. The number of alcoholic hydrogens present in compound 'X' is____.

Answer

Moles of H2H_2 produced at STP=1.344×10−322.4\frac {1.344×10^{−3}}{22.4}
=6×10−56×10^{−5}mole
∴Moles of hydrogen atom produced=12×10−512×10^{−5} mol
Moles of organic compound=1.84×10−392\frac {1.84×10^{−3}}{92}
=2×10−5=2×10^{−5}
∴Number of alcoholic hydrogen present=12×10−52×10−5=6=\frac {12×10^{−5}}{2×10^{−5}}=6

So, the answer is 6.