When 2 moles of ammonia (NH3) decomposes into nitrogen gas (N2) and hydrogen gas (H2), how many moles of HYDROGEN gas are produced?

Question

-1 mole

-2 moles

-3 moles

-4 moles

I was thinking 3 moles?

Answer 1

2NH3 ==> N2 + 3H2. The equation is read like this.
2 mols NH3 yield 1 mol N2 plus 3 mols H2. So the coefficients TELL you that 2 mols NH3 will give you 3 moles H2. You're thinking is good.