78. One litre solution containing 20 g of sucrose
(C12H220m) is isotonic with 450 ml solution
containing 1.65 g of boric acid (H2B03). Find
the molar mass of boric acid.
A. 67.2 g mol-1 B. 162.27 g mol-1
C. 62.7 g mol-1 D. 620.7
g
mol-1
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Explanation:
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