5. What is the average speed of the object after 1 second? A 200 m/s
B. 25 0 m/s
C. 205 m/s
D. 10 m/s

Which of the following is always a reactant in a combustion reaction? oxygen nitrogen hydrogen carbon

Calcium chloride +gold(1) oxide—>

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.