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What is the percentage by mass of a solution containing 5 g of NaCl in 95 g of w

Practice Questions

Q1
What is the percentage by mass of a solution containing 5 g of NaCl in 95 g of water?
  1. 5%
  2. 10%
  3. 15%
  4. 20%

Questions & Step-by-Step Solutions

What is the percentage by mass of a solution containing 5 g of NaCl in 95 g of water?
  • Step 1: Identify the mass of the solute (NaCl), which is 5 g.
  • Step 2: Identify the mass of the solvent (water), which is 95 g.
  • Step 3: Calculate the total mass of the solution by adding the mass of the solute and the mass of the solvent: 5 g + 95 g = 100 g.
  • Step 4: Use the formula for percentage by mass: (mass of solute / total mass) × 100.
  • Step 5: Substitute the values into the formula: (5 g / 100 g) × 100.
  • Step 6: Calculate the result: (5 / 100) × 100 = 5%.
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