How many moles of hydrogen is required to produce 4 moles of ammonia?

Options

A. 15 moles
B. 20 moles
C. 6 moles
D. 4 moles

Answer

C

Explanation

`3H_(2) + N_(2) to 2 NH_(3)`
To get 2 moles of ammonia, 3 mole of `H_(2)` is required.
`:.` To get 4 moles of ammonia = `3/cancel(2) xx cancel(4^(2))`
= 6 moles of `H_(2)` is required.