Answer :
The mass percent of NaCl in the solution is 2.8%.
The ratio of the mass of a solute in a solution to the mass of the solution as a whole is known as the mass percent of the solution.
To calculate the mass percent, divide the mass of the NaCl by the total mass of the solution and multiply by 100%.
NaCl mass = 0.36 g
Solution mass = 12.80 g
Using the formula of mass % ,
Mass percent = (mass of element/total mass of compound) x 100
Mass of NaCl is 0.36g
Total mass of NaCl is 12.80g
NaCl mass % = (0.36 g / 12.80 g) x 100%
= 2.8%
Hence, if 0. 36 g of NACL is dissolved in water and the resulting solution weighs 12.80 g, 2.8% is the mass % of nacl in the solution.
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