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9th Class Science Atoms and Molecules Question Bank 9th CBSE Science Atoms and Molecules

  • question_answer
        What is the law of constant proportions?

    Answer:

                     The law of constant proportions states that a pure chemical compound always consists of the same elements that are combined together in a fixed (or definite) proportion by mass. For example, water, obtained from any source contains hydrogen and oxygen in the ratio of 1 : 8 by mass.


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