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If 18.7 grams of an aqueous solution of ammonium fluoride, NH4F, contains 1.26 grams of ammonium fluoride, what is the
percentage by mass of ammonium fluoride in the solution?

Respuesta :

ardni313

The  percentage by mass of ammonium fluoride in the solution : 6.738%

Further explanation

Given

18.7 g of NH4F solution

1.26 g NH4F

Required

The  percentage by mass

Solution

[tex]\tt \%mass=\dfrac{mass~solute}{mass~solution}\times 100\%[/tex]

mass solute = mass Ammonium fluoride

mass solute = 1.26 g

mass solution = 18.7 g

Input the value :

[tex]\tt \%mass=\dfrac{1.26}{18.7}\times 100\%\\\\\%mass=6.738[/tex]

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