# Question #3037d

##### 1 Answer

#### Explanation:

We're asked to find the *relative abundance* (expressed commonly as a percentage abundance of the total number of isotopes) of the two naturally-occurring isotopes of

The **relative atomic mass** of

We can set up an equation representing the *fractional* abundance of each isotope:

Let's use algebra to solve this equation:

Combining like terms:

This represents the fractional abundance of

Therefore, the percentage abundance of the two isotopes is