How many water molecules (H2O) can be produced from 6 molecules of hydrogen gas (purple) reacting with 6 molecules of oxygen gas (turquoise)? Which reactant is the limiting reactant?

Oxygen and hydrogen molecules
A. 6 water molecules, hydrogen is limiting
B. 3 water molecules, oxygen is limiting
C. 3 water molecules, hydrogen is limiting
D. 12 water molecules, oxygen is limiting

Question

How many water molecules (H2O) can be produced from 6 molecules of hydrogen gas (purple) reacting with 6 molecules of oxygen gas (turquoise)? Which reactant is the limiting reactant? 

Oxygen and hydrogen molecules
 A. 6 water molecules, hydrogen is limiting
 B. 3 water molecules, oxygen is limiting
 C. 3 water molecules, hydrogen is limiting
 D. 12 water molecules, oxygen is limiting