The mass percentage of 8 g of NaCl dissolved in 42 g of water is 16%. To calculate this yourself, follow the steps below:
Determine the mass of solute, 8 g of NaCl.
Determine the mass of solvent, 42 g of water.
Determine the total mass of the solution by adding the masses of solute and solvent, 50 g.
Divide the mass of solute by solution, 8 / 50 = 0.16.
Multiply the ratio by 100, 0.16 × 100 = 16%.
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