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.
A nonmetal and a nonmetal will make molecular compounds like H2O and CO2
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Explanation:
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Its mass is about the same as that of a proton
