Can anyone help me with a little chemistry?

Question

a 1.50g sample of nirtous oxide contains 2.05 * 10^22 N2O molecules. how many nirtogen atoms are in this sample? how many nitrogen atoms are in 1.00g of nitrous oxide?

how do you do this?! please?! =]

Answer 1

excellent question, I will be interested in the answers...

Answer 2

How many N atoms are there in one N2O molecule? Multiply that by 2.05*10^22. that's all!

Next problem is a mole conversion problem. Divide 1.00 g N2O by realtive molar mass N2O (g/mole) to get moles N2O. Multiply by 2 (why?) to get moles N atoms. Finally, multiply that last number by Avogadro's number (things per mole) to get your answer.

Answer 3

Its simply the proportionality. 1 g of N2O contains (2.05*10^22)/1.5 number of atoms.