Question

What is the average atomic mass of an element if it exists 75.77% at a mass of 34.969 g/mol and 24.23% at a mass of 36.966 g/mol?

Answer 1

Answer:

35.453g/mol is the average atomic mass of the element

Explanation:

The average atomic mass of an element is defined as the sum of the mass of its isotopes multiplied by its natural abundance.

The element of the problem has 2 isotopes:

The first with a mass of 34.969g/mol and its abundance is 75.77%

The second has a mass of 36.966g/mol and its abundance is 24.23%

Its natural abundance is:

34.969g/mol * 75.77% + 36.966g/mol * 24.23%

35.453g/mol is the average atomic mass of the element