write the dimension formula for specific gravity
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The gas carbon dioxide, which has a density of 1.976 grams per litre under standard conditions, has a specific gravity of 1.53 (= 1.976/1.29). Because it is the ratio of two quantities that have the same dimensions (mass per unit volume), specific gravity has no dimension.
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It's a ratio between the weight of a substance and the weight of the equal volume of water at 4 degree Celsius so as we all know that ratio has no unit or dimensions so specific gravity is dimensionless....
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