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a solution is made by dissolving 125g of sodium chloride in 1.5kg of water. what is the percent by mass​

Sagot :

Given:

[tex]mass_{solute} = 125 \: g[/tex]

[tex]mass_{solvent} = 1.5 \: kg = 1500 \: g[/tex]

Required:

[tex]\% \: by \: mass[/tex]

Equation:

[tex]\% \: by \: mass = \frac{mass_{solute}}{mass_{solute} \: + \: mass_{solvent}} \times 100[/tex]

Solution:

[tex]\% \: by \: mass = \frac{125 \: g}{125 \: g \: + \: 1500 \: g} \times 100[/tex]

Answer:

[tex]\% \: by \: mass = 7.69\%[/tex]

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