Based on the chemical reaction: N2(g) + 3H2(g) → 2NH3(g), which substance takes up the most space?

a) 2NH3(g)
b) 3H2(g)
c) All of the substances have the same volume
d) N2(g)

the gas with the most moles takes up the most space

and refrain from posting the same question over and over, under new names.

To determine which substance takes up the most space, we need to consider the stoichiometry of the chemical reaction. The balanced equation tells us the molar ratios between the reactants and products.

According to the balanced equation, 1 mole of N2 combines with 3 moles of H2 to produce 2 moles of NH3.

So, in terms of molar volume, 1 mole of N2 occupies a certain volume, 3 moles of H2 occupy three times that volume, and 2 moles of NH3 occupy twice that volume.

Now, the question asks which substance takes up the most space. Since the volume is directly proportional to the number of moles, we can conclude that the substance taking up the most space is the one with the highest number of moles.

In this case, 3 moles of H2 is the highest number of moles among the substances involved in the reaction. Therefore, the answer is (b) 3H2(g) – it takes up the most space.