Answered

the active ingredient in toothpaste is sodium fluoride an anticavity agent. A 170. Gube
of toothpaste lists the concentration of sodium fluoride as 0.24%. How many grams of
sodium fluoride are in the toothpaste?

Answer :

mixter17

There are 0.408 grams of sodium fluoride in the toothpaste.

Why?

We know that there is 0.24% of sodium floride in a 170 grams toothpaste tube. Since the only information related to the toothpaste is its mass, we can assume that the 0.24% (concentration) is referring to the mass percent, and we can calculate it using the following equation:

[tex]MassPercent=\frac{MassSolute}{MasSolution}*100(percent)[/tex]

Now, substituting the given information and calculating, we have:

[tex]MassPercent=\frac{MassSolute}{MasSolution}*100(percent)[/tex]

[tex]\frac{MassPercent*MassSolution}{100}=MassSolute(NaF)\\\\MassSolute(NaF)=\frac{0.24*170g}{100}=0.408g[/tex]

We have that there are 0.408 grams of sodium fluoride in the toothpaste.

Have a nice day!

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