How many milliliter of a 0.77 M HCl solution are needed to react completely with 4.2 g of zinc to form zinc(ll) chloride? Answer in units of mL

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

Heat energy, carbon dioxide, and water are released through which process? a. photosynthesis b. depolymerization c. digestion d. cellular respiration

Which of the four hypothetical substances you investigated would be most harmful to living organisms? 50 points!