How many moles of hydrogen are needed to completely react with 2.0 moles of nitrogen? N2 + 3H2 -- 2 NH3
The answer is 6 moles because 2 moles of nitrogen need 6 moles of hydrogen to correctly respond.
To determine the number of moles of hydrogen needed to react with a given number of moles of nitrogen, we first need to understand the stoichiometry of the reaction.
The balanced chemical equation shows that 1 mole of nitrogen (N2) reacts with 3 moles of hydrogen (H2) to produce 2 moles of ammonia (NH3).
To find out how many moles of hydrogen are needed, we can set up a simple ratio based on the stoichiometry:
1 mole of nitrogen (N2) requires 3 moles of hydrogen (H2).
So, if we have 2.0 moles of nitrogen, we can set up the following ratio:
2.0 moles of nitrogen : X moles of hydrogen = 1 mole of nitrogen : 3 moles of hydrogen
To calculate the value of X, we can use cross-multiplication:
2.0 moles of nitrogen * 3 moles of hydrogen = X moles of hydrogen * 1 mole of nitrogen
X = (2.0 moles of nitrogen * 3 moles of hydrogen) / 1 mole of nitrogen
X = 6.0 moles of hydrogen
Therefore, 6.0 moles of hydrogen are needed to completely react with 2.0 moles of nitrogen.