Question

calculate the mass of mg atom in grams

Answer 1

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Answer 2

Answer:Mass of one atom of magnesium weigh $3.9\times 10^{-23}g$

Explanation:

According to avogadro's law, 1 mole of every substance weighs equal to its molecular mass and contains avogadro's number $6.023\times 10^{23}$ of particles.

To calculate the number of moles, we use the equation:

$\text{Number of moles}=\frac{\text{Given atoms}}{\text{Avogadro's number}}=\frac{1}{6.023\times 10^{23}}=0.16\times 10^{-23}atoms$

1 mole of magnesium weighs = 24.305 g

$0.16\times 10^{-23}$ moles of Zinc weigh = $\frac{24.305}{1}\times 0.16\times 10^{-23}=3.9\times 10^{-23}g$

Thus mass of one atom of magnesium weigh $3/9\times 10^{-23}g$