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Given: 0.5 g NaCl; 0.05 L of solution.

1) Find the molar mass of NaCl.

(22.99) + (35.45) = 58.44 g/mol of NaCl

2) Convert grams of NaCl to moles of NaCl.

(0.5 g NaCl) X (1 mol NaCl / 58.44 g NaCl) = 0.00855578 mol NaCl

3) Use the molarity equation, M = mol / L, to solve for molarity (M).

(0.00855578 mol NaCl / 0.05 L) = 0.17 M

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Q: What is the molarity of the solution where 0.5 g of NaCl is dissolved to make 0.05 L of solution?

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