A 5% solution of glucose (molar mass 180) is isotonic with a 2.5% solution of substance X at the same temperature. The molar mass of X is
A. 90
B. 45
C. 180
D. 360

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1 Answers

Correct Answer - A
`(5)/(180) = (2.5)/(x)` or `x = (2.5 xx 180)/(5) = 90`

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