Question

1 dm^3 of He contain x atoms. How many molecules are there in 1dm^3 of oxygen under the same conditions?

Answer 1

\[8\times6.02\times10^{23}\]

Answer 2

the answer is in term of x

Answer 3

4x

Answer 4

\[x =2\times10^{23}\]

Answer 5

under equal conditions, equal volumes of gas contain equal molecules of gas. This is Avogadro's Law

Answer 6

so the no of atoms is x??

Answer 7

correct.

Answer 8

oh that is my book's answer but i dont know why.. thn for the explaination

Answer 9

if you need explanation try to think of this: imagine atoms/molecules as marbles in a box and that box is your volume, that volume has its own pressure. so now as you know the pressure and volume and know that these two are constant you know that same amount of marbles can be put in that box! pV=nRT if p, V, T = constant then its the same amout of gas in that container no matter which gas it is!