Calculate the number of atoms in 0.2 mole of sodium (Na).
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Calculate the number of atoms in 0.2 mole of sodium (Na).
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Solution —

We know that 1 mole of atoms contains 6.022 x 1023 atoms.

Now,

1 mole of sodium atoms = 6.022 x 1023 atoms. So,

0.2 mole of sodium atoms = 6.022 x 1023 x 0.2 atoms

= 12.044 x 1022 atoms

Thus, 0.2 mole of Sodium element has 12.044 × 1022 Atoms in it.

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