Chapter 10 Vocabulary

Question 1

Atomic Mass

Answer 1

The number of grams of an element that is numerically equals to the atomic mass of the element in amu

Question 2

Empirical Formula

Answer 2

The smallest whole number ratio of the atoms in a compound

Question 3

Mole

Answer 3

The SI unit used to measure amount of substance

Question 4

Molecular Formula

Answer 4

A chemical formula which shows the kinds and numbers of atoms present in a molecule of the compound

Question 5

Molar volume

Answer 5

The volume occupied by a mole of any gas at STP

Question 6

Molar Mass

Answer 6

The mass of a mole of any element or compound

Question 7

Percent composition

Answer 7

The percent by mass of each element in a compound

Question 8

STP

Answer 8

Zero degrees Celsius and 1 ATM

Question 9

Representative Particle

Answer 9

Species present in a substance, usually atoms.

Question 10

Avogadro Number

Answer 10

The number of representative particles of a substance present in 1 mole of that substance (6.02x10^23).

Question 11

Representative Particles to Grams

Answer 11

Divide by 6.02x10^23 to get number of moles

Then multiply by molar mass to get number of grams.

Question 12

Grams to moles

Answer 12

Divide the amount of grams by the molar mass to get number of moles.

Question 13

Grams to representative particles

Answer 13

Divide number of grams by molar mass

Then multiply by (6.02x10^23) to get number of representative particles.

Question 14

Percent composition

Answer 14

Mass of element in one mole/ molar mass of whole compound

Then multiply by 100 to get percentage.