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How many moles of solute are present in 500 mL of a 0.2 M solution? (2021) 2021

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Question: How many moles of solute are present in 500 mL of a 0.2 M solution? (2021) 2021

Options:

  1. 0.1 moles
  2. 0.5 moles
  3. 0.2 moles
  4. 0.25 moles

Correct Answer: 0.1 moles

Exam Year: 2021

Solution: 

Moles = Molarity * Volume (L) = 0.2 M * 0.5 L = 0.1 moles.

How many moles of solute are present in 500 mL of a 0.2 M solution? (2021) 2021

Practice Questions

Q1
How many moles of solute are present in 500 mL of a 0.2 M solution? (2021) 2021
  1. 0.1 moles
  2. 0.5 moles
  3. 0.2 moles
  4. 0.25 moles

Questions & Step-by-Step Solutions

How many moles of solute are present in 500 mL of a 0.2 M solution? (2021) 2021
  • Step 1: Understand the formula for calculating moles, which is Moles = Molarity * Volume.
  • Step 2: Identify the given values: Molarity (0.2 M) and Volume (500 mL).
  • Step 3: Convert the volume from milliliters to liters. Since 1000 mL = 1 L, 500 mL = 0.5 L.
  • Step 4: Plug the values into the formula: Moles = 0.2 M * 0.5 L.
  • Step 5: Calculate the result: 0.2 * 0.5 = 0.1 moles.
  • Molarity – Molarity is a measure of the concentration of a solute in a solution, expressed in moles of solute per liter of solution.
  • Volume Conversion – Understanding the need to convert milliliters to liters when calculating moles using molarity.
  • Mole Calculation – The calculation of moles from molarity and volume using the formula: Moles = Molarity * Volume (L).
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