ILL GIVE BRAINEST Directions: Use dimensional analysis to perform the following calculations. Show all work, include your units, and box your final answers.

2. How many atoms are equal to 1.5 moles of helium?

3. How many moles are equal to 4.15 x 1023 molecules of carbon monoxide?

The activity series is shown in the attached picture. if the element is below the other, then you can displace the other. following the activity series as a guide, the reactions are as follows: nickel and aluminum chloride3 ni + 2 alcl₃  → 3 nicl₂ + 2 albarium and copper bromideba + cubr  →  no reaction because cu is less oxidizable than bapotassium nitrate and aluminum3 kno₃ + al  → al(no₃)₃ + 3 ksodium phosphate and zincnaso₄ + zn  → znso₄ + na

Ido not understand.