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OpenStudy (anonymous):
You need to dissolve CaCl2 in water to make a mixture that is 31.0% calcium chloride by mass. If the total mass of the mixture is 350.3 g, what masses of CaCl2 and water should be used?
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OpenStudy (gebooors):
If x is mass of CaCl2, then x/350.3 = 0.31. Mass of water is 350.3-x
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