1. Jenny knows that the atomic number of the element potassium, K, is 19. She also knows that the average atomic mass can be used to find out how many neutrons
are in most atoms of an element. If the average atomic mass of potassium is
39.098, how many neutrons are found in most atoms of potassium?
A.19
B.20
C.39
D.40

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.

If a solution is considered basic, then a) the hydroxide ion and hydronium ion concentrations are equal. b) the hydroxide ion concentration is less than the hydronium ion concentration. c) the hydronium ion concentration is greater than the hydroxide ion concentration. d) the hydroxide ion concentration is greater than the hydronium ion concentration.

If you have 5.25 grams of methane (ch4), how many grams of co2 will you produce ?