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How many grams of solute are needed to prepare a 3.50% mass/mass solution that has a solution mass of 2.50x10^2 grams.
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How many grams of solute are needed to prepare a 3.50% mass/mass solution that has a solution mass of 2.50x10^2 grams.

User Refresh
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You have to use the fact that percent mass is mass of salute over mass of solution and make the equation (x/250g)x100%=3.5% and solve for x. When done correctly you should get x=87.5g which is the mass of the solute needed. I hope this helps.
User Andrei Amariei
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