Which of the following represents number average molecular mass ? – InterviewSolution

1.	Which of the following represents number average molecular mass ?
Answer» `M=(sumN_iM_i^2)/(sumN_i)` `M=(sumN_iM_i)/(sumN_i)` `M=(sumN_iM_i^2)/(sumN_iM_i)` `M=(sumN_iM_i)/(sumN_i)` ANSWER :B

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