Find the molar mass of each substance: a. Oxygen gas, O2
b. ozone, O3
c. limestone, CaCO3,
d. A typical antacid, Mg(OH)2
e. aspirin, C9H8O4

16. why must the number of electrons lost equal the number of electrons gained in every redox reaction? use 3 – 4 sentences in your own words to address this question. 18. what type of radiation is emitted when chromium-51 decays into manganese-51? show the nuclear equation that leads you to this answer. 19. a radioactive nucleus alpha decays to yield a sodium-24 nucleus in 14.8 hours. what was the identity of the original nucleus? show the nuclear equation that leads you to this answer.