The number of atoms present in 0.58 mole of magnesium, Mg is 3.49×10²³ atoms.
What are atoms?
An atom is the basic building block of chemistry. It is the smallest unit into which matter can be divided without the release of electrically charged particles.
Avogadro's hypothesis
1 mole of Mg = 6.02×10²³ atoms
Therefore,
0.58 mole of Mg = 0.58 × 6.02×10²³
0.58 mole of Mg = 3.49×10²³ atoms
Thus, 3.49×10²³ atoms are present in 0.58 mole of Mg
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