10

Question 1

Empirical formula

Answer 1

A formula with the lowest whole number ratio of elements in a compound

Ex: the empirical formula of hydrogen peroxide (H2O2) is HO.

Question 2

Percent composition

Answer 2

The percent by mass of each element in a compound

Question 3

Avogadro’s hypothesis

Answer 3

Equal volumes of gases at the same temperature and pressure contain equal numbers of particles

Question 4

Standard temperature and pressure (STP)

Answer 4

The conditions under which the volume of a gas is usually measured.

Question 5

Molar volume

Answer 5

The volume occupied by one mole of a gas at STP; 22.4 L

Question 6

Mole

Answer 6

The amount of a substance that contains 6.02 X 10^23 Representative particles of that substance

Question 7

Avogadro’s number

Answer 7

The number of representative particles contained in one mole of a substance

Equal to 6.02 X 10^23 particles

Question 8

Representative particle

Answer 8

The smallest unit into which a substance can be broken down without a change in composition usually atoms, molecules, or ions

Question 9

Molar mass

Answer 9

A term used to refer to the mass of a mole of any substance