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How many grams of salt are needed to make 345 g of salt water that is 31.0% salt by mass? 

          How many grams of salt are needed to make 345 g of salt water that is 31.0% salt by mass?
How many grams of salt are needed to make 345 g of salt water that is 31.0% salt by mass?

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Chemistry: Structure and Properties
Chemistry: Structure and Properties
Nivaldo Tro 2nd Edition
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How many grams of salt are needed to make 345g of salt water that is 31.0% salt by mass? How many grams of salt are needed to make 345 g of salt water that is 31.0% salt by mass?
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Transcript

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00:01 Hello students, we are given by a question in which we have the percentage weight by weight of the solution is 38 .5 % and the weight of solution is given 745 grams.
00:13 So we have to find the weight of the salt.
00:16 So we have the formula that the percentage weight by weight is equal to weight of solute divided by weight of solution multiplies.
00:33 By 100.
00:34 Now we have to put the values in the formula.
00:37 So percentage weight by weight is equal to 38 .5 % equals to rate of solute is weight of salt.
00:45 So we have to find it...
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