Question

how many atoms are in 120gMg

Answer 1

Answer:

This is a theoretical calculation.

Assuming the 12 gms Magnesium is pure Magnesium.

Molecular weight of Magnesium - 24.305 g/mol

Number of moles of Magnesium in 12 gms - 12/24.305 = 0.49372 moles.

The Avagadro constant defines the number of constituent particles (usually atoms) contained in one mole of a substance - 6.023 x 10^23 (dimensionless)

Number of atoms in 12 gms of Magnesium - 0.49372 x 6.023 x 10^23 = 2.973 x 10^23

Answer 2

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1. This is a theoretical calculation.

2. Assuming the 12 gms Magnesium is pure Magnesium.

3. Molecular weight of Magnesium - 24.305 g/mol

4. Number of moles of Magnesium in 12 gms - 12/24.305 = 0.49372 moles.

5. The Avagadro constant defines the number of constituent particles (usually atoms) contained in one mole of a substance - 6.023 x 10^23 (dimensionless)

6. Number of atoms in 12 gms of Magnesium - 0.49372 x 6.023 x 10^23 = 2.973 x 10^23