Consider the following equation for the formation of ammonia from nitrogen and hydrogen :
`N_(2)+2H_(2)=2NH_(3)`
How many hydrogen molecules are required to react with 100 molecules of nitrogen ?

Options

A. 100
B. 200
C. 300
D. 400

Answer

C

Explanation

`underset(1 " mol")(N_(2))+underset(3"mol")(3H_(2)) hArr underset(2"mol")(2NH_(3))`
`because 1 xx N_(0)` molecules of `N_(2)` react with molecules of `H_(2)=3 N_(0)`
`therefore` 100 molecules of `N_(2)` react with molecules of `H_(2)=(3N_(0)xx100)/(1 N_(0))=300`