Question

Determine the number of atoms contained in 5.8 moles of argon

Answer 1

3.5 * 10^24

Step-by-step explanation:

1 mole of anything is equal to 6.022*10^23 (like how 1 dozen of anything is equal to 12).
5.8 mole would therefor be 5.8 * 6.022 * 10^23, since you have 5.8 moles.
5.8 * 6.022 * 10^23 simplifies to 3.49276*10^24, but since only 2 significant figures are given, the number should be rounded to 3.5*10^24