STOICHIOMETRY

Question 1

is a complex mixture of compounds, predominantly containing hydrocarbons

Answer 1

Gasoline

Question 2

Compounds whose carbon atoms are linked together by single bonds

Answer 2

Alkanes

Question 3

Molecules containing only carbon and hydrogen atoms

Answer 3

Hydrocarbons

Question 4

Alkanes have the general formula ________,
where n is an integer

Answer 4

CnH(2n+2)

Question 5

Two or more structures with the same chemical formula

Answer 5

Isomers

Question 6

of octane with excess oxygen produces carbon dioxide and water

Answer 6

Complete combustion

Question 7

with limited oxygen produces carbon monoxide and water

Answer 7

Incomplete combustion

Question 8

Complete and incomplete combustion both occur with the relative amounts of each determined by:

Answer 8

• Ratio of fuel to oxygen
• Engine temperature
• Engine tuning

Question 9

A term used to describe quantitative relationships in chemistry

Answer 9

Stoichiometry

Question 10

The reactant that is completely consumed in a reaction
* Limits the quantity of product produced

Answer 10

Limiting reactant

Question 11

The maximum mass of a product that can be obtained in a reaction is determined by the limiting reactant

Answer 11

Theoretical Yield

Question 12

Used to determine which reactant is the limiting reactant

Answer 12

Theoretical Yield

Question 13

Many factors determine the amount of desired product actually produced in a reaction

Answer 13

• Temperature of the reaction
• Possibility of side reactions
• Further reaction of the product
• Time

Question 14

Calculated by comparing the ratio of the actual yield to the theoretical yield

Answer 14

Percentage yield

Question 15

Ideal amount of product formed under perfect or ideal conditions

Answer 15

Theoretical yield

Question 16

A common laboratory technique that requires understanding solution stoichiometry

Answer 16

Titration

Question 17

A dye used during titration that changes color to indicate when the reaction is complete

Answer 17

Indicator

Question 18

Added to gasoline to improve engine performance, reduce undesirable engine emissions, and reduce dependence on imported petroleum products

Answer 18

Fuel additives

Question 19

Additives improve engine performance by improving the

Answer 19

octane rating

Question 20

A higher octane rating delivers better performance and has lower unwanted

Answer 20

knocking

Question 21

occurs if the fuel mixture in a cylinder ignites prematurely

Answer 21

Knocking