Petroleum Test: Section B

Problems: Use the space to answer the question as fully as possible.

1. Write the molecular formulas for....

Pentane________________________ Octane________________________

Butane________________________ Hexane________________________

2. What alkane has a molecular mass of.... (1 pt. per blank)

100 g/mol?________________________ 16 g/mol? ________________________

3. Draw the structural formula for... (2 pts. each)

Propane, C₃H₈




Decane, C₁₀H₂₂


4. Draw electron-dot formulas for one of the alkanes named in question
3 above: (2 pts. )

Propane
Decane





5. Draw the electron-dot formulas for... (2 pts. each)

Chlorine atom Water molecule




6. What would the molecular formula be for... (1 pt. each)

A 43-carbon alkane? ________________________

A 12-carbon alkane? ________________________

7. Which of the alkanes named in question 6 would have a higher boiling
temperature? (1 pt)

________________________

8. A 35-mL sample of a hydrocarbon has a mass of 24.6 g. (use correct
units) (1 pt. each)


What is the density of this hydrocarbon? ________________________

What would the mass of a 50-mL sample of octane
be?________________________

9. Draw three possible isomers of C₆H₁₄ : (2 pts each)