1.

Mass of one atom of an element is 6.6×10^-23g how moles of element are there in 0.220kg

Answer»

As PER FORMULA
no of MOLES = GIVEN mass/Molar mass
so Given mass=0.220Kg
Molar mass=6.6*10^20 Kg
So, 0.220/6.6*10^20 =0.033*10^18
=3.3*10^18



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