Reaction of gases/ gas stoichiometry

[apbuiii]

Homework Statement

The reaction of 50 mL of H2 gas and 50 mL of N2 gas via the equation: 3H2 + N2 ---> 2NH3 will produce how many mL of product? A reaction of 25 mL of Hydrogen gas and 75 mL of Nitrogen gas? Assume that temperature and pressure are constant.

Homework Equations

Avogadro's Law

The Attempt at a Solution

I know that Volume of gases at STP are proportional to the moles of gas present, so the ratios are 3:1:2, and that i mole of ideal gas is 22.4 L. I'm not totally sure as to where to go from here. Is it kind of a limiting reagent because they give me the volumes of each reactant? Please help. Thanks!

 

[Borek]

It is just a simple limiting reagent, with volumes instead of moles - but, as you have already mentioned, in this case moles and volume can be used interchangeably.

 

[apbuiii]

Okay thank you. Well, I asked this question because of this problem: The reaction of 50 mL of chlorine gas with 50 mL of Ethylene gas Cl2 (g) + C2H4 (g) = C2H4Cl2 (g). How many mL of product will be produced? The answer is 50mL but I don't understand why. Since there is 50 mL of chorine and 50 mL of ethylene, shouldn't there be 100 mL of product? But instead, the answer is just 50 mL...

 

[Borek]

Take a look at the reaction equation. How many moles (total) on the left? How many moles on the right?