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If N(1), N(2), N(3)………Are the number of ...

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 as

A

`(sum N_(i) M_(i)^(2))/(sum N_(i) M_(i))`

B

`(sum N_(i) M_(i))/(sum N_(i))`

C

both of these

D

None of these

Text Solution

Verified by Experts

The correct Answer is:
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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