Consider the following intermediate chemical equations. What is the enthalpy of the overall chemical reaction?

-999 kJ
-250 kJ
250 kJ
999 kJ

What reaction is taking place? 02 + c3h8 = h20 + co2

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.

Which item is most likely part of the safety contract