Answer: 224 grams
Step-by-step explanation:
2H2 + O2 = 2H2O
This implies that 2 moles of oxygen is needed to react with one mole of oxygen to form 2 moles of water
It also implies that
2 moles of hydrogen requires 32 grams of oxygen
14 moles of hydrogen would require ? grams of oxygen
14/2 x 32 = 224 grams