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Give one example how to use avagados units to find a moles of an compound

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)