chapt 7 mole concept

Question 1

Define relative atomic/ molecular/ formula mass.

Answer 1

-> Relative atomic mass - of an element is the average mass of 1 atom of that element relative to 1/12 the mass of an atom of carbon12 .

Question 2

How to find mole (3)

Answer 2

1. no. of particles / 6.02x10^23
2. mass of subst. (g) / mr (g/mol)
3. vol (dm^3) / 24dm^3

Question 3

How to find concentration (2)

Answer 3

1. mass of solute (g) / vol of solvent (dm^3) [g/dm^3]
2. no. of moles of solute/ vol of solvent (dm^3) [mol/dm^3]