What is the number of atoms in 6amu of He?
A. 18
B.18? Avogadro's number
C.54
D. 54?Avogadro's number

Dear Student,

Given:

The mass of Helium (He) = 6 amu
The molecular mass of He = 4 amu

moles of He = mass of He / molecular mass of He
moles = 6/4 = 1.5
number of atoms = n x Avogadro's number
= 3/2 x 6.023*1023
The answer is Number of atoms in 6 amu of Helium are 3/2 x Avogadro's number = 9.0345 x 1023

Regards

 

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