If you came upon an aqueous solution in the lab which reacted with a strip of magnesium , you could make the hypothesis that the compound in this solution is : a . an acid
b . a base
C. a salt

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.

List four observations that indicate that a chemical reaction may be taking place

How many moles of water are created if 3 moles of hydrogen react completely with excess oxygen?