How many grams of NH3 can be produced from 4.39 mol of N2?

LCW

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Hydrogen gas, H2, reacts with nitrogen gas, N2, to form ammonia gas, NH3, according to the equation

3H2(g)+N2(g) --> 2NH3(g)

1) How many grams of NH3 can be produced from 4.39 mol of N2? Express in g NH3.
2) How many grams of H2 are needed to produce 11.74 g of NH3? Express in g H2.
3) How many molecules (not moles) of NH3 are produced from 3.38×10^-4 g of H2?
 
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