Q45Long answer
A box contains some identical red coloured balls, labelled as A, each weighing 2 grams. Another box contains identical blue coloured balls, labelled as B, each weighing 5 grams. Consider the combinations AB, AB2, A2B and A2B3 and show that law of multiple proportions is applicable.
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(Hint : Show that the masses of B which combine with the fixed mass of A in different combinations are related to each other by simple whole numbers). 13 Some Basic Concepts of Chemistry