Question

for the reaction 2H2 + 02 arrow 2H20 jow many moles of water can be produced from 6.0 mol of oxygen

Answer 1

Assuming excess hydrogen, and according to the stoichiometric ratio between oxygen and water (2:1) one mol of O2 will produce 2 mol of water.

So... if you have six moles, how many moles of water will you have?

Answer 2

12

Answer 3

yup, you know why 12 is the answer right?

Answer 4

its double so 6 doubled or 6x2=12

Answer 5

yup, and you know why the ratio is 2:1?

Answer 6

hydrogen is the excess

Answer 7

hydrogen is excess (assumption), so it has nothing to do with the reaction
If you look at the balanced eqn., the coefficient for oxygen is 1, and for water is 2, so that's why you can tell

Btw, please post this in the chem section nxt. time :)