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molar mass of H2SO4= 2(1)+ 32 + 4(16)

=98g/mol

no. of moles = no. of molecules/6.02*10^23

no. of moles = 2.05*10^16/6.02*10^23

no. of moles = 3.406*10^(-8)mol

mass of a substance = molar mass*no. of moles

= 98*3.406*10^(-8)

=3.34*10^-6g Ans

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Anonymous

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