Asolution contains 4.5 times 10 to the negative 3 m hci. determine the hydroxide concentreation of the solution.

Why do scientists look for patterns in the world? a. patterns can explain observations. b. patterns never change, no matter what. c. patterns are easy for scientists to detect. d. patterns are all the same, through all time.

Three alkali metals in group 1 are a. calcium, strontium, barium b. boron, aluminum, gallium c. sodium, potassium, rubidium d. fluorine, iodine, chlorine

Which part of earth’s surface receives the most direct rays from the sun? a) equator b) ocean c) poles d) mountains