11Is the ans 13g ?
The mass to charge ratio for a cation is 1.5 X 10-8 kg/C.What is the mass of this atom?
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4 Answers
1@ Ronald
How can an atom weigh 13 gms??U made an error..
Ans is 2.4 X 10-24gms
11ya got it..il tell u the mistake..i took the cation to be Mn+ but here only if you assume the cation to be uni-positively charged ans is coming,,i.e M+(n=1)
posting the solution below..
11Let the cation be M+ (do read above post too)
Let n moles of it be taken,
Therefore, no of moles of M+ ions=n x Na
charge =charge of a proton x no of M+
=1.602 x 10-19 x 6.023 x 1023 x n
mass=n x AW (Atm.wt)
mass/charge = 1.5 x 10-5 g/C
In LHS n gets cancelled..u get AW..
mass of an atom = AW/Na
=1.44/Na
=2.403 x 10-24