Calculations

Question 0

Relative atomic mass

Answer 0

Sum of (percentage abundance x relative atomic mass of each isotope) / 100

Question 1

Number of moles

Answer 1

n = m over M Or m= n x M

Question 2

Relative formular mass or molar mass

Answer 2

Eg (1xH)+(4xC) =

Question 3

Amount of substance in a mole

Answer 3

Number of particles of the substance / number of particles in one mole (6.022 x 10^23

Question 4

Ice block contains 2.70 x10^23 of water. How many molecules does this represent

Answer 4

2.70x10^23 / 6.022 x10^23