Answered

The astronaut then measures the abundance of magnesium on the new planet, obtaining the following results:
Isotope Abundance
(%) Mass
(amu)
24Mg 78.99 23.99
25Mg
10.00 24.99
26Mg 11.01 25.98
What is the atomic mass of magnesium for this planet?

Answer :

Divide each isotope mass by 100 and times it by the percentage of that isotope. Add them all together and there's your answer.

For example:

If you had 79% of Mg-24 then it would be (24/100) × 79.

Etc

Other Questions