Question

10 raise to 22 atoms of an element 'x' are found to have a mass of 930 mg . Calculate the molar mass of an element 'x'

Answer 1

Hey!

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Number of atoms= 10^22
Mass of element= 930 mg=0.930 g

1 mole= 6.022×10^23 atoms (Avagardo's Number)

Number of moles=Given mass/ Molar mass

We know,

Molecular mass= Given mass/Avagardo's number × given attoms

= 0.930 g ×6.022×10^23/10^22
=5.6×10 g

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Hope it helps...!!!