For the reaction 2H2 + O2--> 2H2O, how many moles of water can be produced from 13.58 mol of oxygen?
a. 27
b. 6.8
c. 14
d. 20
How many moles of water can be produced?
2016-07-25 5:24 pm
回答 (2)
2016-07-25 5:27 pm
✔ 最佳答案
2H₂ + O₂ → 2H₂OOR: Mole ratio O₂ : H₂O = 1 : 2
No. of moles of O₂ reacted = 13.58 mol
No. of moles of H₂O produced = (13.58 mol) × 2 = 27.16 mol ≈ 27 mol (2 sig. fig.)
...... Answer : a. 27
2016-07-25 5:36 pm
As you have given the balanced equation
2H2 + O2 = 2H2O
Note the molar ratios are 2:1::2
Hence
13.58 mol(O2) is equivalent to '1' in the molar ratios.
Hence
13.58 X 2 = 27.16 mol(H2O) is equivalent to '2' in the molar ratios.
Hence from the optional answers, answer 'a' 27 moles.
2H2 + O2 = 2H2O
Note the molar ratios are 2:1::2
Hence
13.58 mol(O2) is equivalent to '1' in the molar ratios.
Hence
13.58 X 2 = 27.16 mol(H2O) is equivalent to '2' in the molar ratios.
Hence from the optional answers, answer 'a' 27 moles.
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