The general formula for alkanes is CₙH₂ₙ₊₂. What does n represent in this formula?

Quiz 2 - CEGR 338

Quiz
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Engineering
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University
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Medium
Adriélli Bonfanti Pagnoncelli
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11 questions
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1.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
The number of hydrogen atoms in the molecule
The number of carbon atoms in the molecule
The molecular mass of the alkane
The number of bonds in the molecule
2.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
If N = 5, which corresponds to pentane, what is the molecular formula of pentane?
C₅H₈
C₅H₁₀
C₅H₁₂
C₅H₁₄
3.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Balance the following combustion reaction:
C6H14+O2→CO2+H2O
2C6H14+19O2 → 6CO2+14H2O
2C6H14+24O2 → 12CO2+7H2O
2C6H14+19O2 → 12CO2+14H2O
2C6H14+19O2 → 6CO2+7H2O
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Calculate the molar mass of hexane (C₆H₁₄)
Molar mass:
Carbon (C) = 12.01 g/mol
Hydrogen (H) = 1.008 g/mol
72.06 g/mol
86.17 g/mol
100.12 g/mol
58.12 g/mol
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Convert 100 g of hexane (C₆H₁₄) to moles.
(Molar mass of hexane = 86.17 g/mol)
0.86 moles
1.16 moles
1.39 moles
1.92 moles
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Using the balanced equation you balanced before:
2 C₆H₁₄ + 19 O₂ → 12 CO₂ + 14 H₂O
How many moles of oxygen (O₂) are required to burn 1.16 moles of hexane (C₆H₁₄)?
9.50 moles O₂
10.25 moles O₂
11.03 moles O₂
12.50 moles O₂
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Convert 11.03 moles of oxygen (O₂) to grams. The molar mass of O₂ is 32.00 g/mol.
321.0 g
353.0 g
288.5 g
375.2 g
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