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a
Law of conservation of mass
b
Law of multiple Proportion
c
Law of definite Proportion
d
All
answer is B.
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Detailed Solution
CO : CO2: C2O3 or (C1O1.5) 1 mol C = 12 g C in CO = 16 g O =12 g C in CO2 = 32g O =12g C om C2O3=24 gOThus, ratio of O that combines with 12gC = 16:32:24 = 2:4:3