IfN_(1),N_(2),N_(3),……are the number of molcules with molecular ma – InterviewSolution

1.	IfN_(1),N_(2),N_(3),……are the number of molcules with molecular masses M_(1),M_(2),(M_(3),…respectively ,then mass average molar mass is expressed as:
Answer» `(SigmaNiMi^(2))/(SigmaNiMi)` `(SigmaNiMi)/(SigmaNi)` `(SigmaMi^(2))/(SigmaNi)` `(SigmaNiMi)/(SigmaMi)` ANSWER :A

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