12. Using the balanced equation 2H(g)+O2(g)=2H2O(g), calculate how many grams of water would be produced from 4 mol of hydrogen and 2 mol of oxygen?

Question

A. 18 g
B. 36 g
C. 54 g
D. 72 g

Answer 1

The molar ratio between hydrogen and water in the balanced equation is 2:2 (2 moles of hydrogen produce 2 moles of water). Therefore, from 4 mol of hydrogen, you would produce 4 mol of water.

4 mol of water * molar mass of water (18 g/mol) = 72 g

Therefore, the correct answer is:

D. 72 g