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What is the number of moles in 250 mL of a 2 M NaCl solution? (2021)

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Question: What is the number of moles in 250 mL of a 2 M NaCl solution? (2021)

Options:

  1. 0.5
  2. 1
  3. 2
  4. 0.25

Correct Answer: 0.5

Solution: 

Moles = Molarity x Volume (L) = 2 M x 0.250 L = 0.5 moles.

What is the number of moles in 250 mL of a 2 M NaCl solution? (2021)

Practice Questions

Q1
What is the number of moles in 250 mL of a 2 M NaCl solution? (2021)
  1. 0.5
  2. 1
  3. 2
  4. 0.25

Questions & Step-by-Step Solutions

What is the number of moles in 250 mL of a 2 M NaCl solution? (2021)
  • Step 1: Understand the formula for calculating moles, which is Moles = Molarity x Volume.
  • Step 2: Identify the molarity of the solution, which is given as 2 M (moles per liter).
  • Step 3: Convert the volume from milliliters to liters. Since 250 mL is equal to 0.250 L, we will use this value.
  • Step 4: Plug the values into the formula: Moles = 2 M x 0.250 L.
  • Step 5: Calculate the result: 2 x 0.250 = 0.5 moles.
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