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Chemistry Question!! Please help, I'm stupid...
Calculate the molarity of a saline solution prepared by dissolving 19.3 g of sodium chloride in 250 mL of water.

Please show all work!!!

Respuesta :

gradman555p98x9p
First, let's calculate the concentration by gram per liter:
C = [tex] \frac{19.3}{0.25} [/tex] = 77.2 g/L

Now, let's convert it to molarity, knowing that the molar mass of sodium chloride is 58.5g/mol:
Molarity = [tex] \frac{77.2}{58.5} [/tex] = 1.31 M

For more explanation:
molarity = [tex] \frac{gram}{Liter} [/tex] * [tex] \frac{Mol}{gram} [/tex] = [tex] \frac{mol}{Liter} [/tex]

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