1. The molar mass of calcium nitrate is . How many atoms of nitrogen are in 3 grams of the compound? 2. How many total atoms are in 4.5 milligrams of ammonium dichromate? How many atoms of oxygen are present in the sample?

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.

Light waves travel than sound waves.

Amechanical wave that transports a lot of energy will have a