Problem: Find the percent by mass of sodium chloride in a 1.30 M NaCl solution. The density of the solution is 1.06 g/mL.

Assuming we have 1 L solution

Step 1. mass of the solution

$1 L \times \frac{1 mL}{10^{- 3} L} \times \frac{1.06 g}{mL} =$ 1060 g solution

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Find the percent by mass of sodium chloride in a 1.30 M NaCl solution. The density of the solution is 1.06 g/mL.

What scientific concept do you need to know in order to solve this problem?

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