Which of the following is a single displacement reaction? 2Hg + O2 + 2HgO

AgNO3 + NaCI AgCl + NaNO3

2K1 = C122KCI = 12

C4H8 + 6024C02 + 4H20

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.