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Question

A can of chicken broth contains 470 mg of sodium chloride in 282.5 g of broth. What is the percent by mass of sodium chloride in the broth?

Answer 1

Notice that the 470 is milligrams, so there is 0.470g of NaCl. Percent composition by mass is then 100 * 0.470 / 282.5 = 0.166%.