How many atoms of N are there in 30.0 g of NH4NO3?

What does the cell nucleus do or, how does it function?

Asample of hydrated tin (ii) chloride (sncl2) has a mass of 4.90 g. when it is dehydrated, it has a mass of 4.10 g. which is the correct chemical formula for the hydrate? sncl2•2h2o          sncl2•4h2o          sncl2•6h2o

How many neutrons does an element have if its atomic number is 50 and its mass number is 166