Question

Calculate the mass of 12.044 X 1025 molecules of Oxygen (O2).
[Atomic mass of O = 16 u]​

Answer 1

Answer:

For Helium,

Number of atoms=Number of moles ×6.022×10

23

No of Moles =

6.022×10

23

12.044×10

23

= 2.

Now, atomic mass of He=4

Weight = 2×4 = 8 g