In a mixture of 1 g H 2 and 8 g O 2 the mole fraction of hydrogen is

Question

In a mixture of 1 g H 2 and 8 g O 2 the mole fraction of hydrogen is (A) 0.667 (B) 0.5 (C) 0.33 (D) None of the above

Tardigrade Admin · Accepted Answer

Number of moles of hydrogen (H2)=( text Weight in gram of H2/ text Molecular weight of H2) Weight of H2 in gram =1 g molecular weight of H 2=2 Number of moles of H2=(1/2)=0.5 moles Number of moles of (O2)=( text Weight in gram of O2/ text Molecular weight of O2) =(8/32)=0.25 moles Mole fraction of (H2)=( text Number of moles of H2/ text Total number of moles ) =(0.5/0.25+0.5)=0.667

Q. In a mixture of 1gH2​ and 8gO2​ the mole fraction of hydrogen is

0.667

0.5

0.33

None of the above

Q. In a mixture of $1 g H_{2}$ and $8 g O_{2}$ the mole fraction of hydrogen is