• # question_answer Is the law of constant composition true for all types of compounds? Explain why or why not.

Answer:

No, law of constant composition is not true for all types of compounds. It is true only for the compounds obtained from one isotope. For example, carbon exists in two common isotopes, $^{12}C$ and $^{14}C$. When it forms $C{{O}_{2}}$ from $^{12}C,$ the ratio of masses is 12 : 32 = 3 : 8 but from $^{14}C,$ the ratio will be 14 : 32 = 7 : 16 which is not same as in the first case.

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