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How many moles are in 500 mL of a 2 M NaCl solution?

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Question: How many moles are in 500 mL of a 2 M NaCl solution?

Options:

  1. 0.5
  2. 1
  3. 2
  4. 4

Correct Answer: 1

Solution: 

Moles = molarity x volume (in L) = 2 M x 0.5 L = 1 mole.

How many moles are in 500 mL of a 2 M NaCl solution?

Practice Questions

Q1
How many moles are in 500 mL of a 2 M NaCl solution?
  1. 0.5
  2. 1
  3. 2
  4. 4

Questions & Step-by-Step Solutions

How many moles are in 500 mL of a 2 M NaCl solution?
  • Step 1: Understand that 'M' in 2 M NaCl means molarity, which is moles of solute per liter of solution.
  • Step 2: Convert the volume from milliliters (mL) to liters (L). Since 1000 mL = 1 L, 500 mL = 0.5 L.
  • Step 3: Use the formula for moles: Moles = Molarity x Volume.
  • Step 4: Plug in the values: Moles = 2 M x 0.5 L.
  • Step 5: Calculate the result: 2 x 0.5 = 1 mole.
  • Molarity – Molarity is a measure of concentration defined as the number of moles of solute per liter of solution.
  • Volume Conversion – Understanding the need to convert milliliters to liters when calculating moles from molarity.
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