Question #474d7

1 Answer
Oct 25, 2015

Answer:

#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.