Quiz 3a (10.28.2020)

Question 1

The mass of an individual molecule or formula unit, also known as molecular mass or molecular weight

Answer 1

formula mass

Question 2

Molar mass = ______ (in g/mol)

Answer 2

formula mass

Question 3

Simplest whole-number ratio of the atoms of elements in a compound

Answer 3

empirical formula

Question 4

An empirical formula represents a ratio of atoms or a ratio of moles of atoms, not a ratio of __

Answer 4

masses

Question 5

Finding empirical formula

Answer 5

convert percentages to grams, convert grams to moles, write pseudo formula using moles as subscripts, divide all by smallest # of moles, multiply by a # to make all whole #s

Question 6

The ____ formula is a multiple of the empirical formula

Answer 6

molecular

Question 7

To determine the molecular formula, you need to know the empirical formula and the molar mass of the compound. Molecular formula = (empirical formula)n. n = molar mass divided by ____

Answer 7

empirical formula molar mass

Question 8

In combustion analysis, all the original c forms CO2, the original h forms H2O, and the original mass of O is found by ____

Answer 8

subtraction

Question 9

The study of the numerical relationship between chemical quantities in a chemical reaction is called ____

Answer 9

stoichiometry

Question 10

The reactant that makes the least amount of product ___

Answer 10

limiting reactant

Question 11

this is the amount of product that can be made in a chemical reaction based on the amount of limiting reactant____

Answer 11

theoretical yield

Question 12

the actual amount of product made in a chemical reaction is called the____

Answer 12

actual yield

Question 13

the percentage of the maximum number of product we can actually make

Answer 13

percent yield

Question 14

the reactant in excess is any reactant that occurs in a quantity greater than is required to

Answer 14

completely react with the limiting reactant