Question

Please solve this one
Calculate the number of atoms in 100 u of He. ?

Answer 1

Atomic mass of Helium = 4 u


➡mass of one Helium atom = 4 u


➡No. of atoms in 100 u of Helium = 100/4

= 25 Helium atoms

Answer 2

Hi


Here is the answer


We know, MASS OF ONE HELIEM ATOM= 4u


GIVEN, TATAL MASS OF HE GAS=100u

So, NO. OF ATOMS OF He IN 100u OF HE IS 100/4 =25


So there are 25 number of atoms in 100 u of He.


Hope it helps

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