If 0.50 g of copper metal was reacted with excess nitric acid, determine the mass of copper (II) nitrate, nitrogen dioxide gas, and water.
Cu (s) + 4HNO3 (aq) → Cu(NO3)2 (aq) +2NO2 (g) +2H20 (1)

Which best describes why nh4+ can form an ionic bond with cl-?

Maria wants to determine which type of disinfectant kills the most bacteria. which of the following is the best way for maria to determine this? a. ask ten different companies that make disinfectants which type is best. b. put the same amount and species of bacteria on ten identical plates, and add ten different kinds of disinfectant to each plate. c. interview ten different people to determine which type of disinfectant they prefer. d. put the same amount and species of bacteria on ten identical plates, and add a different disinfectant to each plate.

Margaret wants to make an orange flavored drink by stirring powdered drink mix into a glass of water. she doesn't like drinks that have small clumps of powdered solid in them, so she wants the drink to be a perfect solution. what factors should margaret not consider when deciding how much powder to add to her glass of water?