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The chemical formula of the compound shows the ratio of the atoms of elements in a compound. This must not be confused with the ratio of their masses.
The answer depends on the compound.
121 can be expressed as the ratio 121/1, where both numerator and denominator are integers, the denominator not being 0. That is the definition of a rational number.
242/364 = 121/182
NO!! Because '121' is a compound number ' 11 x 11 = 11^(2) = 121