Which two phrases most likely explain how the rock shown here formed?

What type of reaction is zn + cucl2 → cu + zncl2?

Fill in the coefficients that will balance the following reaction: a0cr2(so4)3 + a1agno3

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.