Correct option:
Number of atoms is given by option is C, i.e. [tex]1.20\times10^{24}\,atoms[/tex].
Calculation of number of atoms:
As, mole tells about the amount of substance.
Chemical units known as moles are employed to calculate the mass or molecular mass of a compound, molecule, or atom. For instance, there is one mole in 12 grams of carbon.
[tex]1 mole= 6.022\times10^{22}\,atoms/molecules/ions[/tex]
Molecular mass of Mg= 24.30 g/mol
Given weight of Mg= 48.60 g
Atoms present in 48.60 g= ?
[tex]6.022\times10^{23}= N_A[/tex](Avogadro's number)
[tex]n=\frac{m}{M}=\frac{Given\,number\,of\,atoms}{N_A}\\\\\frac{m}{M}=\frac{N}{N_A}\\\\\frac{48.60}{24.30}=\frac{N}{6.022\times 10^{23}}\\\\ N= 2\times 6.022\times10^{23}\\N= 12.044\times10^{23}\,atoms[/tex]
[tex]N= 1.2\times10^{24}\,atoms\,of\,Mg[/tex]
So, the correct option is C.
Learn more about mole concept here,
https://brainly.com/question/15209553
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