1. Avogadro's Number
* Avogadro's number tells us the number of atoms or molecules in one mole of a substance. It's approximately 6.022 x 10^23.
2. Calculation
* Set up the conversion:
(1.45 x 10^-17 mole As) * (6.022 x 10^23 atoms As / 1 mole As)
* Cancel out the units:
The "mole As" units cancel out, leaving us with just "atoms As".
* Multiply the numbers:
(1.45 x 10^-17) * (6.022 x 10^23) = 8.73 x 10^6 atoms As
Answer: There are approximately 8.73 x 10^6 arsenic atoms in 1.45 x 10^-17 mole of arsenic.
