5.For the reaction C + 2H2 --> CH4, how many moles of hydrogen are required to produce 19.86 mol of methane, CH4?
a. 20
b. 40
c. 15
d. 25
How many moles of hydrogen are required?
2016-07-25 5:20 pm
回答 (2)
2016-07-25 5:24 pm
C + 2H₂ → CH₄
OR: Mole ratio H₂ : CH₄ = 2 : 1
No. of moles of CH₄ produced = 19.86 mol
No. of moles of H₂ required = (19.86 mol) × 2 = 39.72 mol ≈ 40 mol
...... Answer : b. 40
OR: Mole ratio H₂ : CH₄ = 2 : 1
No. of moles of CH₄ produced = 19.86 mol
No. of moles of H₂ required = (19.86 mol) × 2 = 39.72 mol ≈ 40 mol
...... Answer : b. 40
2016-07-25 5:24 pm
Write the BALANCED reaction equation , already done!!!!
C + 2H2 = CH4
The molar ratios are 1:2::1
Hence by equivalence
19.86 moles(CH4) is equivalent to '1'
Hence
19,86 x 2 = 39,72 moles(H2) is equivalent to '2'.
Hence from the optional values, the nearest is 'b' at 40 moles.
C + 2H2 = CH4
The molar ratios are 1:2::1
Hence by equivalence
19.86 moles(CH4) is equivalent to '1'
Hence
19,86 x 2 = 39,72 moles(H2) is equivalent to '2'.
Hence from the optional values, the nearest is 'b' at 40 moles.
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