Find the mass of 4.77 x 1022 atoms of silver nitrate (AgNO3).

Explain why pure hydrogen cyanide does not conduct electricity, but become a conductor when it is dissolved in water? (at room temp, pure hcn exists as a volatile liquid)

Use the periodic table to determine the electron configuration of dysprosium (dy) and americium (am) in noble-gas notation.

Use examples from the article to explain one positive and one negative effect that chemistry has had on society.