Question

The atomic mass of magnesium is 24 calculate the mass of 3.011×10 power 24 atoms of magnesium

Answer 1

No of moles = number of atoms ÷ avogadro's no ,so

n=3.011×10^24÷6.02×10^23=5 mols

sample mass = no of moles × atomic mass, so

ms= 5×24= 120 g

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