Combustion of Hydrocarbons

What property of hydrocarbons decreases as the molecule size increases?

• Boiling point

• Viscosity

• Combustibility

• Flammability

What are hydrocarbons used as in vehicles?

• Coolants

• Fuels

• Insulators

• Lubricants

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NGSS.HS-PS3-1

NGSS.HS-PS3-3

What does complete combustion of hydrocarbons produce?

• Carbon dioxide and hydrogen

• Carbon dioxide and water

• Hydrogen gas and oxygen

• Carbon monoxide and water

What is required for complete combustion to occur?

• Limited hydrocarbons

• Unlimited oxygen

• Unlimited hydrocarbons

• Limited oxygen

What is the result of oxidizing carbon and hydrogen atoms during combustion?

• Carbon monoxide and hydrogen

• Carbon dioxide and water

• Hydrogen peroxide

• Ozone and water

How do you balance the hydrogen atoms in the combustion of methane?

• Add 2 in front of CH4

• Add 2 in front of O2

• Add 2 in front of CO2

• Add 2 in front of H2O

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What is the first step in balancing a combustion equation?

• Balancing hydrogen atoms

• Balancing water molecules

• Balancing carbon atoms

• Balancing oxygen atoms

In the combustion equation for a hydrocarbon with three carbon atoms, how many CO2 molecules are needed to balance carbon atoms?

• Two

• Three

• Four

• Five

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NGSS.MS-PS1-5

How many water molecules are needed to balance the hydrogen atoms in the combustion of a hydrocarbon with eight hydrogen atoms?

• Two

• Four

• Six

• Eight

Tags

NGSS.MS-PS1-5

To balance ten oxygen atoms in a combustion equation, how many O2 molecules are needed?

• Two

• Three

• Ten

• Five

Tags

NGSS.HS-PS1-7