Question

How many moles of H2 are needed to produce 34.8 moles of NH3?

Answer 1

Moles H₂ needed = 52.2

Further explanation

A reaction coefficient is a number in the chemical formula of a substance involved in the reaction equation. The reaction coefficient is useful for equalizing reagents and products.

Reaction

N₂(g)+3H₂(g)⇒2NH₃(g)

From the reaction equation above, the reaction coefficient shows the mole ratio of reagents and products

moles NH₃ produced = 34.8

mol H₂: moles NH₃ = 3: 2, so moles H₂ :  

$\tt moles~H_2=\dfrac{coefficient~H_2}{coefficient~NH_3}\times moles~NH_3\\\\moles~H_2= \dfrac{3}{2}\times 34.8=52.2$