Chemistry help !?Need help please!

Posted on 2017-09-22 10:37:00 in Chemistry by HALEE

Hydrogen gas, H2, reacts with nitrogen gas, N2, to form ammonia gas, NH3, according to the equation 
3H2(g)+N2(g)→2NH3(g) 
NOTE: Throughout this tutorial use molar masses expressed to five significant figures. 
Part A 
How many moles of NH3 can be produced from 21.0 mol of H2 and excess N2? 

Part B 
How many grams of NH3 can be produced from 3.59 mol of N2 and excess H2?

Part C 
How many grams of H2 are needed to produce 12.00 g of NH3? 

Part D 
How many molecules (not moles) of NH3 are produced from 2.06×10−4

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