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What is the molarity of 5.30 g of Na2CO3 dissolved in 400.0 mL solution?(a) 0.150 M(b) 0.125 M(c) 0.155 M(d) 0.120 MThe question was asked in an interview for internship.This intriguing question comes from Yields in Cell Culture in chapter Homogenous Reactions of Bioprocess Engineering

Answer»

The correct option is (b) 0.125 M

Explanation: MV = grams / molar mass

(X) (0.4000 L) = 5.30 g / 105.988 g mol^-1

0.12501415 M

x = 0.125 M (to three SIG figs).



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