Fuels and Fractional Distillation.

Which of the following statements about crude oil is accurate?

• Crude oil is an infinite resource.
• Crude oil is formed from the remains of land animals.
• Crude oil is a finite resource.
• Crude oil is primarily composed of water.

What is the primary source of crude oil formation?

• The remains of tiny sea creatures called plankton
• The breakdown of organic waste in landfills
• The remains of ancient trees
• The decomposition of land animals

What is the structural formula for methane?

• C3H8
• CH4
• C4H10
• C2H6

Which of the following best defines hydrocarbons?

• Molecules that are exclusively solid at room temperature
• Molecules that contain nitrogen and carbon
• Molecules made up of hydrogen and carbon atoms only
• Molecules made up of hydrogen and oxygen atoms

What is the relationship between carbon and hydrogen atoms in alkanes?

• Each carbon atom is bonded to two hydrogen atoms.
• Each carbon atom is bonded to one hydrogen atom.
• Each carbon atom is bonded to three hydrogen atoms.
• Each carbon atom is bonded to two hydrogen atoms plus additional hydrogen atoms.

What is the general formula for alkanes?

• CnH2n+1
• CnH2n-2
• CnH2n+2
• CnH2n

How do you calculate the number of hydrogen atoms in an alkane?

• Multiply the number of carbon atoms by 2 and add 2
• Multiply the number of carbon atoms by 2 and add 1
• Multiply the number of carbon atoms by 3 and subtract 1
• Multiply the number of carbon atoms by 2 and subtract 2

Which hydrocarbon has the formula C2H6?

• Methane
• Propane
• Butane
• Ethane

How many hydrogen atoms are present in propane?

• 6
• 8
• 10
• 4

Which of the following hydrocarbons contains 10 hydrogen atoms?

• Propane
• Butane
• Methane
• Ethane