Question #f6570
1 Answer
Simple,
Firstly, you want to find the number of moles in
So, as you probably already know
Number of Particles = Number of moles x Avogadro's constant
Since we re to find the number of moles
Number of moles = Number of Particles/Avogadro's Constant
1.26 moles in
Now, since we are to calculate the mass, we will use this formula
No. of moles =
The molar mass of helium is 4.00g/mol
Rearranging this equation to our needs, we have
Mass = Number of moles x Molar Mass
Mass =
Mass =
Thus, there is 5.04g of helium in
Hope this helps