PLS HELP BESTIES 4 BRAINLIST Which region in the USA is at the lowest risk for an earthquake

How has the scientific community addressed the safety of chemicals? a. chemicals are repeatedly tested, even those that have existed for a long time. b. existing chemicals are tested if they have never been tested before. c. chemicals are tested if they are suspected to have caused a problem. d. only new chemicals are tested.

Which produce would best increase the amount of heat energy that is actually gained by calorimeter b

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