Calculate the number of atoms in 52u of helium

Asked by admin @ 12/08/2021 in Chemistry viewed by 305 People

Calculate the number of atoms of 52 u of He.

Answered by admin @ 12/08/2021

Atomic mass of He is 4u

one mole of He have mass = 4u
number of moles in 52 u of He = 52/4 = 13 moles

1 mole =6.022×10^23 atoms

in 13 moles, number of atom:
=13× 6.022×10^23
=78.286 × 10^23
=7.8286 × 10^24.

In 52 u of He 7.8286 × 10^24 atoms are present.

Hope this will helps you

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