Question

find the mass of 1.5 * 10^20 atoms of Mg

Answer 1

Answer:

mass of 1mole of mg=24gm

no of atom in a mole=6.022*10^23 atom

mass of 1 atom of mg= 24/(6.022*10^23)

mass of 1 atom of mg= 3.985*10^-23gm

mass of 1.5*10^20 atom= (3.985*10^-23)*(1.5*10^20) =5.977*10^-3gm

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