Question

How much oxygen is formed from 264 g of $C{O}_2$ and 216 g of $H_{2}O$?

• A. 96 g
• B. 216 g
• C. 264 g
• D. 192 g.

Answer 1

The correct option is D 192 g.

• Moles = Weight in gms/molecular weight

So, moles of CO${}_2$ =264/44 = 6 moles.

• In same way moles of H2O = 216/18 = 12 moles.

In a reaction of photosynthesis, 6 moles of CO${}_2$ and 6 moles of water lead to the production of 6 moles of oxygen. Here, CO${}_2$ is a limiting reactant. So only 6 moles of oxygen will be formed.So, 6 moles of O${}_2$ = weight in gms/32 (molecular weight of O${}_2$). Weight in gms = 6 x 32 = 192 gms.