Sieving is a technique used to separate mixtures containing solid particles of (a) small sizes
(b) large sizes
(c) the same sizes
(d) different sizes

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.

Rays from the sun are not considered matter true or false

Calculate the concentration of all species in a 0.165 m solution of h2co3.