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A hard water sample contains 0.0087 %Ca by mass (in the form of Ca2+ ions). What...

A hard water sample contains 0.0087 %Ca by mass (in the form of Ca2+ ions).

What mass of water in grams contains 1.1 g of Ca? (1.1 g of Ca is the recommended daily allowance of calcium for 19- to 24-year-olds.)

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Answer = 12643.68 gram of hard water

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