Answer:
25.0%
Step-by-step explanation:
pretty sure its this hope you get it right good luck
A solution's mass by mass percent concentration,
m/m%
, tells you the number of grams of solute present for every
100 g
of solution.
Your solution contains two substances: sodium chloride,
NaCl
, the solute, and water, the solvent. To find the total mass of the solution, add the mass of the solute and the mass of the solvent.
mass solution = 50.0 g + 150.0 g
mass solution = 200.0 g
Now, this solution contains
50.0 g
of solute in
200.0 g
=
2
⋅
100.0 g
of solution. This means that
100.0 g
of solution will contain
50.0 g
2
=
25.0 g
of solute. Since this represents the amount of solute present in
100.0 g
of solution, you can say that the mass by mass percent concentration is equal to
m/m% = 25.0% NaCl
−−−−−−−−−−−−−−−−−−−
The answer is rounded to three sig figs.
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