calculate the moles of N atoms in a sample of C7H5(NO2)3 that has same number of O atoms as 12.2g of C6H12O6.

Which is a character of nuclear fusion but not nuclear fission

Iknow the answer is a but i don't know why

11. phosphorus-32 is radioactive and has a half life of 14 days. how much of a 124 mg sample of phosphorus-32 is present after 56 days? a) 7.75 mg b) 15.5 mg c) 31.0 mg d) 62.0 mg