ch 4

Question 1

_____ enhances the atmosphere’s ability to hold head and leads to global warming

Answer 1

CO2

Question 2

primary cause of rising atmospheric CO2 concentration

Answer 2

burning of fossil fuels

Question 3

combustion reaction

Answer 3

substance combines with O2 to form one or more oxygen-containing compounds

Question 4

combustion reactions emit

Answer 4

heat

Question 5

the heat from the combustion of gasoline expands the gaseous combustion products in a car engine’s cylinders, which

Answer 5

move the car

Question 6

the coefficients in a chem equation specify the relative amounts in ____ of each of the substances involved

Answer 6

moles

Question 7

the numerical relationships between chemical amounts in a balanced chem equation

Answer 7

stoichiometry

Question 8

limiting reactant

Answer 8

reactant that limits the amount of products in a chem reaction (makes least amount of product)

Question 9

in excess

Answer 9

the reactants that do not limit the amount of product

Question 10

theoretical yield

Answer 10

the max amount of product that can be made based on the limiting reactant

Question 11

actual yield

Answer 11

amount of product actually produced

Question 12

the actual yield is always ___ or ___ than the theoretical yield

Answer 12

= or less

Question 13

percent yield

Answer 13

% of the theoretical yield that was actually attainted

Question 14

% yield formula

Answer 14

actual yield / theoretical yield x 100%