Question

A sample of an element X is made up of 11% of the isotope X-17 and 89% of the isotope X-13.

Calculate the relative atomic mass, Ar, of element X.

Answer 1

To calculate the relative atomic mass (Ar) of element X, use the formula: Ar = (abundance of isotope X-17 * atomic mass of X-17) + (abundance of isotope X-13 * atomic mass of X-13)

Step-by-step explanation:

The relative atomic mass of an element is the weighted average of the masses of its isotopes, taking into account their relative abundances. To calculate the relative atomic mass (Ar) of element X, we can use the following formula:

Ar = (abundance of isotope X-17 * atomic mass of X-17) + (abundance of isotope X-13 * atomic mass of X-13)

Given that the abundance of X-17 is 11% (or 0.11) and the abundance of X-13 is 89% (or 0.89), and their respective atomic masses are known, plug in these values into the formula to calculate the relative atomic mass of element X.