Exam #2

Question 1

Practical Definition of a Mole

Answer 1

one mole of any element is equal to the mass # (atomic mass) of the element in grams

Question 2

Semi-technical definition of a mole

Answer 2

a mole is a counting unit, similar in concept to a dozen

Question 3

To enter into a balanced chemical equation…

Answer 3

we need to be in moles

Question 4

Stoichiometry

Answer 4

relationship between moles of react and moles of product, established by the coefficients of a balanced equation

Question 5

We manipulate chemical equations with…

Answer 5

moles

Question 6

Limiting reactant

Answer 6

reactant fully consumed in a chemical reaction, limits the quantity of product produced

Question 7

Excess reactant

Answer 7

reactant that remains after reaction is complete

Question 8

Theoretical yield

Answer 8

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

Question 9

actual yield

Answer 9

the amount of product actually produced by a chemical reaction

Question 10

percent yield

Answer 10

(actual/theoretical) x 100

Question 11

Quantity of excess reactant remaining

Answer 11

moles excess initial - moles excess consumed = moles excess remained