If `N_(1), N_(2), N_(3)`………Are the number of molecules with mole – InterviewSolution

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1.	If `N_(1), N_(2), N_(3)`………Are the number of molecules with molecular masses `M_(1), M_(2), M_(3)`…….respectively, then average molecular mass is expressed asA. `(sum N_(i) M_(i)^(2))/(sum N_(i) M_(i))`B. `(sum N_(i) M_(i))/(sum N_(i))`C. both of theseD. None of these
Answer» Correct Answer - C Number average molecular mass `overline (Mn) = (sum N_(i) M_(i))/(sum N_(i))` Mass average molecular mass `overline(Mw) = (sum N_(i) M_(i)^(2))/(sum N_(i) M_(i))`

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