${\mathrm{N}}_2+3{\mathrm{H}}_2\to 2{\mathrm{NH}}_3$ Based on this reaction, how many moles of nitrogen are required to combine 2 moles of Hydrogen?

Using the given reaction:

• For every 1 mole of N₂, 3 moles of H₂ are required.
• To find out how much N₂ is needed for 2 moles of H₂, we use the ratio N₂ : H₂ = 1 : 3.

This means:

Moles of N2 required = Moles of H2 given / Ratio of H2 to N2
Moles of N2 required = 2 / 3 moles.
 

So, 2/3 moles of N₂ are needed to react with 2 moles of H₂.

Correct option: c) 2/3