Question

the astronaut then measures the abundance of magnesium on the new planet, obtaining the following results
what is the atomic mass of magnesium for this planet?
express your answer to two decimal places, and include the appropriate units.
view available hint(s)

Explanation:

Step1: Calculate the contribution of \(^{24}\text{Mg}\)

Multiply the abundance (in decimal) by the mass.
\(0.7899\times23.99 = 18.959701\)

Step2: Calculate the contribution of \(^{25}\text{Mg}\)

Multiply the abundance (in decimal) by the mass.
\(0.1000\times24.99=2.499\)

Step3: Calculate the contribution of \(^{26}\text{Mg}\)

Multiply the abundance (in decimal) by the mass.
\(0.1101\times25.98 = 2.860398\)

Step4: Sum up the contributions

Add the results from the previous steps.
\(18.959701+2.499 + 2.860398=24.319099\approx24.32\)

Answer:

\(24.32\) amu