Use the octet rule to explain why metals and nonmetals typically form oppositely charged ions. Explain how we would use the octet rule to predict the...

Use the octet rule to explain why metals and nonmetals typically form oppositely charged ions. Explain how we would use the octet rule to predict the charge of a potassium ion and a sulfide ion.

A compound is found to contain 49.5% carbon, 5.19% hydrogen, 16.5% oxygen, and 28.9% nitrogen. Its molecular mass is 194.2 g/mol. What is its empirical formula? What is its molecular formula? Explain what each of these formulas tells us about the molecule.