C4

Question 1

What is relative atomic mass

Answer 1

It’s the most common weight of all isotopes

Question 2

How do you calculate relative atomic mass

Answer 2

(Mass of isotope1 x % of abundance of isotope1) X (Mass of isotope2 x % of abundance of isotope2) / 100

Question 3

What is relative formula mass

Answer 3

It’s the mass of a compound and then sun of the relative atomic masses of the masses

• relative formula mass
• no big numbers over 1

Question 4

What is Avrogandros constant

Answer 4

6.02 x 10(23)

We used it to see how many moles are in a compound

e.g CH=2 atoms 2x(6.02 x 10(23))

Question 5

How do you work out moles

Answer 5

Moles= mass(g) / Ar or Mr

Question 6

What must the line be drawn with at the bottom if the filter paper and why?

Answer 6

It must be drawn with pencil as it’s insoluble and won’t dissolve in the solvent and won’t make the results inaccurate