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Sagot :
Explanation:
First of all a basic is ...
To go from moles to molecules, multiply the number of moles by 6.02 x 1023.
To go from molecules to moles, divide the numbers of molecules by 6.02 x 1023.
How many atoms and molecules of Sulphur are present in 64.0 g of Sulphur (S8)?
answe:- Molecular mass of S8 = 32 × 8 = 256 u
1 mole of Sulphur molecules = 256 g = 6.022 × 1023 molecules of Sulphur
1 gram of Sulphur molecules = 6.022 × 1023 / 256 = 0.023523 × 1023 molecules
64 gram of Sulphur molecules = 64 × 0.023523 × 1023 = 1.505 × 1023 molecules
1 molecules of Sulphur S8 contains 8 atom of Sulphur
1.505 × 1023 molecules of Sulphur contains 8 Sulphur atom = 8 × 1.505 × 1023 = 1.204 × 1024 atoms
For a compound you basically use :-
given mass/ molecular mass= no of moles
# but if no of particle ( such as atoms) is given then:-
Number of moles = (Given number of particles)/(Avogadro's number)
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