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Water hardness is expressed as parts per million calcium carbonate. If there are 654.1mg of calcium...

Water hardness is expressed as parts per million calcium carbonate. If there are 654.1mg of calcium carbonate in every 10.0 kg water, what is the water hardness expressed in ppm? Answer with 3 significant figures and do not put units in the answer box (they are ppm).

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Answer #1

Hardness = 65.4 ppm

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