Chapter 10

Question 1

Mole

Answer 1

The amount of substance that contains 6.02 × 10^23 representative particles of that substance

Question 2

Avogadro’s Number

Answer 2

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

Question 3

Representative particles

Answer 3

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

Question 4

Molar mass

Answer 4

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

Question 5

Avagadro’s hypothesis

Answer 5

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

Question 6

Standard temperature and pressure (STP)

Answer 6

The conditions under which the volume of a gas is usually measured, 0°C, 101.3kPa or 1 atm

Question 7

Molar volume

Answer 7

The volume occupied by one mole of gas at standard temperature and pressure

Question 8

Percent composition

Answer 8

The percent by mass of each elementary in a compound

Question 9

Empirical formula

Answer 9

Formula with the lowest whole number ratio of elements in a compound

Question 10

% by mass of element

Answer 10

(Mass of element/mass of compound) × 100