Problem: The mass of solute per 100 mL of solution is abbreviated as (m/v). Mass is not technically the same thing as weight, but the abbreviation (w/v) is also common. How many grams of sucrose are needed to make 685 mL of a 31.0% (w/v) sucrose solution? 

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The mass of solute per 100 mL of solution is abbreviated as (m/v). Mass is not technically the same thing as weight, but the abbreviation (w/v) is also common. 

How many grams of sucrose are needed to make 685 mL of a 31.0% (w/v) sucrose solution?