Moles, Concentrations, Displacement

Question 1

What is the mole?

Answer 1

6x10^23 units of something

Question 2

How to calculate the amount is miles of a substance:

mol

Answer 2

Mass (g) / Molar mass (g/mol)

Question 3

How to calculate the concentration in (mol/dm^3)

Answer 3

Amount of substance (mol) / volume (dm^3)

Question 4

How to calculate concentration in (g/dm^3)

Answer 4

Mass (g) / volume (dm^3)

Question 5

To calculate the amount of gas (mol)

Answer 5

Volume (dm^3) / 24

Or

Volume (cm^3) / 24000

Question 6

Why may it not be impossible to obtain a calculated amount?

Answer 6

• The reaction may not go to completion because it is reversible.
• Some of the product may be lost when separated from the reaction mixture.
• Some of the product may react differently to the reaction.

Question 7

To calculate percentage yield:

Answer 7

Actual mass of product / max theoretical mass of product x 100

Question 8

What is a displacement reaction?

Answer 8

When a more reactive element replaces or pushes out a less reactive element from a compound.

Question 9

What is oxidation?

Answer 9

Loss of electrons

Question 10

What is reduction

Answer 10

Gain of electrons

Question 11

How to calculate atom economy

Answer 11

Relative formula mass of desired product /
Relative formula mass of reactant
X100