C4.1 Relative masses and moles

Question 1

What is a relative atomic mass?

Answer 1

Relative masses of atoms of different elements used, instead of actual masses of atoms as mass of single atom so tiny not practical for use in experiments or calculations.

Question 2

What is the mole?

Answer 2

Saying or writing ‘relative atomic mass in grams’ or ‘relative formula mass in grams’ rather clumsy.
Chemists have shorthand word for amount of substance a mole.

Question 3

What is the abbreviation for mole?

Answer 3

mol.

Question 4

Does a mole of any substance change for atoms, molecules or ions?

Answer 4

No.

Question 5

What is 1 mole?

Answer 5

Simply relative atomic mass or relative formula mass of any substance expressed in grams.

Question 6

What is the Avogadro constant in standard form?

Answer 6

6.02*10**23/mol.

Question 7

What is the equation of moles from masses?

Answer 7

Number of moles=mass(g)÷relative atomic mass.

Number of moles=mass(g)÷relative formula mass.

Question 8

What is the equation of masses from moles?

Answer 8

Mass(g)=number of moles * relative atomic mass.

Mass(g)=number of moles * relative formula mass.