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OpenStudy (anonymous):
How many grams of a stock solution that is 85.5 percent H2SO4 by mass would be needed to make 150 grams of a 45.0 percent by mass solution?
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OpenStudy (anonymous):
150 grams of 45% solution will contain 45 * 150/100 = 67.5 g of h2SO4 so you need 67.5 / 85.5 * 100 = 78.95 grams of the stock solutiom
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