If 16g of oxygen contains 1 mole of oxygen atoms,calculate the mass of 1 atom of oxygen.

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Solution

Concept : mole concept
Atomic mass of 1 atom of oxygen = Atomic weight of an atom/ 6.022 × 10²³ atom
Hence,
Mass of 1 atom of oxygen = 1g atomic mass of oxygen atom/ 6.022 × 10²³
= 16 g/ 6.022 × 10²³
= 2.65 × 10^-23g

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