Which of the following is a conjugate acid–base pair? a. HNO3 – , H2NO3
b. HNH4, NH4 +
c. H2F, HF–
d. HPO4 2– , PO4 3–
e. H2CN, CN–

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.

Using the first volume and temperature reading on the table as v1 and t1, solve for the unknown values in the table below. remember to use the rules of significant figures when entering your numeric response.

The identities of substances are the same before and after which type of change