Answer:
6.4286 Mol of Calcium Chloride
Step-by-step explanation:
3.87x10^24 1 mol
---------------- x ---------------- = .64286 x 10 = 6.4286 Mol
1 6.02 x 10^23
The molecules formula is 6.02 x 10^23
divide 3.87 to 6.02 and subtract the amount of exponents againts each other in the 10^24
24 - 23 = 1 (no exponent)