Assuming 100 g of lactic acid, the constituents are:
40.0 g C x
6.71 g H x
53.3 g O x
3.33 mol C
6.66 mol H
3.33 mol O
C3.33
H6.66
O3.33
CH2O
= empirical formula
3
C3H6O3 is the molecular formula
SOLUTION:
Sample Problem 3.5 (continued)
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