Which is the number of moles of carbon dioxide produced from the complete combustion of 70.3 moles of ethanol?
C2H60+O2-->CO2+H2O
A. 140
B.210
C.35
D.280
Chemistry Problem, Please help!?
2016-07-25 4:49 am
回答 (3)
2016-07-25 4:56 am
The balanced equation is :
2C₂H₆0 + 7O₂ → 4CO₂ + 6H₂O
OR: mole ratio C₂H₆0 : CO₂ = 2 : 4
No. of moles of C₂H₆0 = 70.3 mol
No. of moles of CO₂ = (70.3 mol) × (4/2) = 140.6 mol ≈ 140 mol
...... The answer is : A. 140
2C₂H₆0 + 7O₂ → 4CO₂ + 6H₂O
OR: mole ratio C₂H₆0 : CO₂ = 2 : 4
No. of moles of C₂H₆0 = 70.3 mol
No. of moles of CO₂ = (70.3 mol) × (4/2) = 140.6 mol ≈ 140 mol
...... The answer is : A. 140
2016-07-25 5:36 am
You need to balance the equation first for ONE mole of ethanol
C2H60+3O2-->2CO2+3H2O
Now it should be clear to you that ONE mole of ethanol produces 2 moles of CO2. Work it out from that.
C2H60+3O2-->2CO2+3H2O
Now it should be clear to you that ONE mole of ethanol produces 2 moles of CO2. Work it out from that.
2016-07-25 4:54 am
C2H6O + 3O2 ---------> 3CO2 + 3H2O
1 mole of C2H6O gives 3 moles of CO2
so 70.3 moles of C2H6O will give 3 X 70.3 = 210.9 moles of CO2
so answer is B
1 mole of C2H6O gives 3 moles of CO2
so 70.3 moles of C2H6O will give 3 X 70.3 = 210.9 moles of CO2
so answer is B
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