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Given that sodium chloride is 39.0% sodium by mass, how many grams of sodium chloride are needed to have 400.mg of na present?
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Awoman's basketball has a circumference between 28.5 and 29.0 inches and a maximum weight of 20 ounces (two significant figures). what are these specifications in units of centimeters and grams?
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How many atoms or molecules are there in a mole of a substance?
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Given that sodium chloride is 39.0% sodium by mass, how many grams of sodium chloride are needed to...
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