Moles

Question 1

Empirical formula

Answer 1

The simplest whole number ratio of atoms of each element in a molecule.

Question 2

Molecular formula

Answer 2

The actual number of atoms of each element in a compound.

Question 3

Amount of substance

Answer 3

The quantity whose unit of the mole, used as a means of counting any species.

Question 4

Mole

Answer 4

The amount of any substance combining as many elementary particles as there are carbon atoms in exactly 12g of the carbon-12 isotope, that is 6.02X10^23

Question 5

Avogadro constant

Answer 5

The number of atoms per mole of the carbon-12 isotope, that is 6.02X10^23

Question 6

Molar mass

Answer 6

The mass per mile of a substance, in units gmol^-1

Question 7

Anhydrous

Answer 7

Containing no water molecules

Question 8

Hydrated

Answer 8

A crystalline compound containing water molecules

Question 9

Water of crystallisation

Answer 9

Water molecule that are bound into the crystalline structure of a compound

Question 10

Percentage error =

Answer 10

(Total uncertainty) / (value measured) X100%

Question 11

Solute

Answer 11

The substance which dissolves

Question 12

Solvent

Answer 12

The liquid which dissolved the solute

Question 13

Solution

Answer 13

The mixture of a solute dissolved in a solvent

Question 14

Molar gas volume at RTP

Answer 14

24.0 dm^3mol^-1

Question 15

Ideal gas equation

Answer 15

PV =nRT

When R = 8.314 J K^-1 mol^-1

Question 16

A perfectly ideal gas would

Answer 16

Have particles with zero volume and no intermolecular forces