Answer:
A Type IV PFD is an approved device designed to be thrown to a person in the water. It is not designed to be worn. It is designed to have at least 16.5 pounds of buoyancy. The most com- mon Type IV PFD is a buoyant cushion.
2.00x10^23 x 1 mol/6.02x10^23 molecules x 279.25g C10H15O9/1 mol
= 92.77 grams
Molar mass of C10H15O9 is 279.25 grams.
So the answer is 92.77 grams
2+ charge = atom has lost 2 electrons
27+2=29
original atom has 29 electrons
Atomic # = 29
<u>Copper (Cu2+)</u>
