Questions: Unit 7 Exam What is the molarity of a solution in which 3.8 moles of sodium chloride is dissolved in water to a final volume of 2.5 L ? Molarity ( mol / L ) Enter

Unit 7 Exam What is the molarity of a solution in which 3.8 moles of sodium chloride is dissolved in water to a final volume of 2.5 L ? Molarity ( mol / L ) Enter
Transcript text: Unit 7 Exam What is the molarity of a solution in which 3.8 moles of sodium chloride is dissolved in water to a final volume of 2.5 L ? Molarity ( $\mathrm{mol} / \mathrm{L}$ ) Enter
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Solution

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Solution Steps

Step 1: Understand the Definition of Molarity

Molarity is defined as the number of moles of solute divided by the volume of the solution in liters. The formula for molarity (\(M\)) is:

\[ M = \frac{\text{moles of solute}}{\text{volume of solution in liters}} \]

Step 2: Identify the Given Values

From the problem, we are given:

  • Moles of sodium chloride (\(\text{NaCl}\)) = 3.8 moles
  • Volume of the solution = 2.5 liters
Step 3: Calculate the Molarity

Substitute the given values into the molarity formula:

\[ M = \frac{3.8 \, \text{moles}}{2.5 \, \text{L}} \]

Step 4: Perform the Calculation

Calculate the molarity:

\[ M = 1.52 \, \text{mol/L} \]

Final Answer

The molarity of the solution is \(\boxed{1.52 \, \text{mol/L}}\).

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