Which statement is true about a catalyst?
A: It decreases the rate of a reaction.
B: It remains unused during the reaction.
C: It reduces the collisions between reactants.
D: It changes the final products of the reaction.

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.