Pressure has an effect on boiling point because pressure affects
a. the entropy of a gas.
b. the entropy of a liquid.
c. the entropy of both a gas and a liquid.
d. neither the entropy of a gas nor the entropy of a liquid.

The reaction q+r2=r2q is found to be first order in r2 and

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.

Long term exposure to waves can cause sunburns and skin cancer. a) visible b) infrared c) gamma rays d) ultraviole