Answer:
14
Step-by-step explanation:
From the equation, we see that 1 mol of methane produces 2 moles of water. To find the amount of water produced if 7.0 moles of methane react, we use the following proportion:
1 mol of methane / 7 moles of methane = 2 moles of water / x moles of water
x = 7*2 = 14 moles of water