
Justin G. answered 10/21/19
Experienced High School Math & Science Tutor
The most important concept involved in this question is that 1 mole of any individual element equals 6.02 • 1023 atoms. This means that it doesn't matter which element is involved in the question, as long as it's just a single element and not a compound. We can use that conversion rate in the following equation:
1.849 mol Rb • (6.02 • 1023 atoms / 1 mol) = 1.113 • 1024 atoms Rb