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What is the mass percent of Na in NaF? Provide your answer to two decimal places.
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3. Chemical Reactions
Mass Percent
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A solution is prepared by adding 29.0 L of KNO3 to 512 L of water. What is the percent by volume of KNO3 in the solution?
A
5.36%
B
0.0567%
C
29.0%
D
18.4%
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Identify the volumes involved: the volume of KNO3 added is 29.0 L, and the volume of water is 512 L.
Calculate the total volume of the solution by adding the volume of KNO3 and the volume of water: \(\text{Total Volume} = 29.0\, \text{L} + 512\, \text{L}\).
Use the formula for percent by volume, which is given by: \(\text{Percent by volume} = \left( \frac{\text{Volume of solute}}{\text{Total volume of solution}} \right) \times 100\%\).
Substitute the known values into the formula: \(\text{Percent by volume} = \left( \frac{29.0}{29.0 + 512} \right) \times 100\%\).
Perform the division and multiplication to find the percent by volume of KNO3 in the solution.
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