Why is Co2 called a greenhouse gas

If the atomic mass of an atom is 34 and the atom contains 13 protons, how many neutrons does the atom contain?

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.

In 2002, the rare earth elements mine in mountain pass, california was closed because