Question

Based on the reaction written below, how many moles of oxygen are required to react

completely with 5.08 grams of hydrogen?
2H₂ + O2 → 2H₂O

Answer 1

1.27

Step-by-step explanation:

1) according to the equation of the reaction

`\\u [O_2]=(1)/(2) \\u(H_2);`

2) if M(H₂)=2 [gr/mol] and m(H₂)=5.08 [gr], then it is possible to calculate ν(H₂):

`\\u(H_2)=(m(H_2)/(M(H_2));`

3) finally, the required ν[O₂] is:

`\\u[O_2]=(1)/(2)* (m(H_2))/(M(H_2)); \ = > \ \\u[O_2]=(1)/(2) *(5.08)/(2)=1.27[moles].`