Question

So I have quite a few stoichiometry questions, I haven't been taught it so I really don't know...
1) S + O2 = SO2
How many moles of sulfur are needed to produce 15.0 mol of sulfur dioxide?

2) 2H2 + O2 = 2H2O
How many moles of water are produced from 13.35 mol of oxygen?

3) 6Li + N2 mc007-1.jpg 2Li3N
If 12 mol of lithium were reacted with excess nitrogen gas, how many moles of lithium nitride would be produced?

Please and thank you!

Answer 1

@SolomonZelman @Abmon98

Answer 2

in 1) you look for the mole ratio according to the balanced chemical equation. 1 mole of sulphur reacts with oxygen to produce 1 mole of of SO2, what if 15 moles were produced
1:1
x mole of Sulphur: 15 mole of SO2
15*1/1=15 moles of sulphur.
Try out question 2 now :)

Answer 3

So with that logic, would #2 be 26.70 moles?

Answer 4

yes that's right :D

Answer 5

If 12 mol of lithium were reacted with excess nitrogen gas, how many moles of lithium nitride would be produced?