(Answered) 1 64 g of a radioactive substance is prepared 85 hours

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1. 64 g of a radioactive substance is prepared. 85 hours later, only 2 g remains. To the nearest hour, what is the radioactive half-life of the substance?

2. A new transition metal, paulium, has been discovered, which is represented by the chemical symbol Pl. This metal can form the ions Pl2+, Pl3+, and Pl4+. Given this information, what is the correct name for the compound Pl3N4?

3. How many grams of carbon dioxide gas (CO2) are produced burning 102 g of propane? Round your answer to the nearest gram.

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