Calculations

Question 1

How do you calculate Relative Atomic Mass? (RAM)

Answer 1

((mass number of isotope 1 * abundancy of isotope 1) + (mass number of isotope 2 * abundancy of isotope 2)) / 100

Question 2

How do you calculate Mr?

Answer 2

You simply add up all the mass numbers of the elements in the compound.

Question 3

How do you calculate moles?

Answer 3

Mass / Relative Atomic Mass

Question 4

How do you calculate empirical formula?

Answer 4

1) Convert the elements into moles
2) Divide each mole by the smallest mole
3) If you have a decimal, then multiply it by a common factor which turns both numbers into whole numbers.