Question

Question #474d7

Answer 1

`1"g"` helium contains the most particles.

Explanation:

The relative atomic mass in grams of an element contains the number of particles equal to the Avogadro Constant `=6.02xx10^(23)"mol"^(-1)`

So `m/A_r` `xx6.02xx10^(23)` will give you the number of particles, in this case atoms, which are present.

Using approx. `A_r` values:

For `Al` `n=(1)/(27)xx6.02xx10^(23)=2.23xx10^(22)`

For `C` `n=1/12xx6.02xx10^(23)=5xx10^(22)`

For `He` `n=1/4xx6.02xx10^(23)=15xx10^(22)`

For `Fe` `n=1/56xx6.02xx10^(23)=1.07xx10^(22)`

So you can see from these data that 1g of He contains the most atoms.