Atoms and Reactions (Book 2)

Question 1

Define a mole (amount of a substance)

Answer 1

The amount of any substance containing as many particles are there are are carbon atoms in exactly 12g of Carbon - 12.

Question 2

Define Avogadro’s Constant

Answer 2

The number of particles in one mole of any substance. (6.02x10^23)

Question 3

Define Molar Mass (mr with units)

Answer 3

Mass (in grams) per mole of a substance (g/mol)

Question 4

Define the Empirical Formula

Answer 4

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

Question 5

Define the Molecular Formula

Question 6

Define the Molecular Formula

Answer 6

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

Question 7

Define Hydrated Salt

Answer 7

A compound which has water molecules (waters of crystallisation) incorporated.

Question 8

Define Anhydrous Salt

Answer 8

A compound which remains when all the waters of crystallisation are removed.

Question 9

Define Waters of Crystalisation

Answer 9

Water molecules which make up park f the crystal structure of a compound, that can be removed by heating.

Question 10

Define a Standard solution

Answer 10

A solution with a known concentration.