1.

Calculate the number of moles for 12.044 xx 10^(23) number of He atoms (finding mole from number of particles) .

Answer»

Solution :No. of MOLES = n
Given mass = m
Molar mass = M
Given NUMBER of particles = N
Avagadro number of particles = `N_(0)`
We know ,
1 mole = `6.022 xx 10^(23)`
The number of moles = `("given number of particles")/("Avogadro number")`
`implies n = (N)/(N_(0)) = (12.044 xx 10^(23))/(6.022 xx 10^(23)) = 2`


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