if the mass of 0.25 moles of an elementxis 2.25 g,the mass of one atom of x is about:
Vaishal Shah , 13 Years ago
Grade 12
Physical Chemistry> mass of atom...
2 Answers
bhanu p
Last Activity: 13 Years ago
It is given that, 0.25mol weighs 2.25g => 1mol weighs 9g .
Then also 9g contains (6.022)1023 atoms => 1 atom weighs 9/(6.022)1023 ~ (1.5)10-23 g.
Nihal Anand
Last Activity: 3 Years ago
We have,
Mass of 0.25 moles = 2.25g
Therefore, weight of 1mole = 2.25g/0.25 = 9g
Now,
Mass of atoms = 9g/ NA (avogrado's no.)
= 9g/6.022*10^23
=1.494520093*10^-23 ~1.5*10^(-23)
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