Average Atomic Mass EX: Calculate the avg. atomic mass of oxygen if its
abundance in nature is 99.76% 160, 0.04% 170, and
0.20% 180.
Avg.
Atomic =
Mass
(16)(99.76) + (17)(0.04)+(18)(0.20) 16 amu
100

In any energy conversion, some of the energy is lost to the environment as question 5 options: electrical energy potential energy sound energy thermal energy

H2so4(aq) + mg(s)—> mgso4(aq) +h2(g) which substance is the acid in the reaction?

Which statement best describes the oxidation numbers of the atoms found in magnesium chloride? a. magnesium has a 2- oxidation number and chlorine has a 1+ oxidation number. b. magnesium has a 2- oxidation number and chlorine has a 2+ oxidation number. c. magnesium has a 2+ oxidation number and chlorine has a 1- oxidation number. d. magnesium has a 1+ oxidation number and chlorine has a 1- oxidation number.