Chemical Quantities Homework

Question 1

Once the empirical formula is determined, we can calculate its mass in grams. Then, we can divide the molar mass of the compound by the empirical formula mass to determine the small integer. This small integer is used to determine the __________ __________.

Answer 1

molecular formula

Question 2

To determine the molar mass of a compound, multiply the molar mass of each element by its __________ in the formula and add the results.

Answer 2

subscript

Question 3

The molar mass of an element or compound provides one of the most useful __________ __________ in chemistry.

Answer 3

conversion factors

Question 4

In chemistry, particles such as atoms, molecules, and ions are counted by the __________, which is equal to 6.022 x 1023 items

Answer 4

mole

Question 5

A formula that represents the simplest whole number ratio of atoms in a compound is called a(n) __________ formula.

Answer 5

empirical

Question 6

The actual formulas of compounds is known as the __________ formula.

Answer 6

molecular

Question 7

The empirical formula is found by converting __________ of each element to moles and finding the lowest whole-number ratio to use as subscripts.

Answer 7

grams

Question 8

__________ mass is the quantity in grams that is equal to the atomic mass of any element.

Answer 8

Molar

Question 9

One mole of a molecular compound contains Avogadro’s number of particles. One mole of an ionic compound contains Avogadro’s number of __________ __________.

Answer 9

6.022x10^23
or
6.022 x 10 23
or
6.022*10^23

Question 10

The __________ percent composition of an element is the mass of the element divided by the total mass of the compound and multiplied by 100.

Answer 10

mass