How many moles of water will be produced if we begin with 2 moles of oxygen gas? Refer to the balanced equation when answering: 2H_(2)(g)+O_(2)(g)arrow 2H_(2)O(g) A. 1.0 mol B. 2.0 mol C. 3.0 mol D. 4.0 mol A B Oc D

The balanced chemical equation given is $2H_{2}(g)+O_{2}(g)\rightarrow 2H_{2}O(g)$. This equation tells us that 1 mole of oxygen gas (O2) reacts with 2 moles of hydrogen gas (H2) to produce 2 moles of water (H2O). Therefore, if we start with 2 moles of oxygen gas, we will produce 2*2 = 4 moles of water. So, the correct answer is B. 2.0 mol.