Quantitative Chemistry

Question 1

Relative atomic mass (Ar)

Answer 1

Number of protons and neutrons

Question 2

Molecular mass (Mr)

Answer 2

The sum of the relative atomic mass in a compound

Question 3

Percentage yield formula

Answer 3

Actual yield / theoretical yield

Question 4

Atom economy formula

Answer 4

RAM of desired products / RAM of all reactants

Question 5

Concentration measurement

Answer 5

Measured in grams per dm³ (g/dm³) or moles per dm³ (mol/dm³)

Question 6

Concentration formula (1)

Answer 6

Mass / volume

Question 7

Concentration formula (2)

Answer 7

Moles / volume

Question 8

Volume of 1 mole

Answer 8

Is 24dm³ of any gas at room temperature and pressure

Question 9

Moles formula (1)

Answer 9

Mass / Mr

Question 10

Moles formula (2)

Answer 10

Volume x concentration

Question 11

Volume formula

Answer 11

Moles x 24

Question 12

Avogadro’s constant

Answer 12

It is the number of particles of any substance that makes up 1 mole

6.02 × 10^23 mol-1

Question 13

Limiting reactants

Answer 13

The reactant that is completely used up is called the limiting reactant because it limits the amount of products made