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If 10 grams of NaCl are dissolved in water, how many moles of NaCl are present?

Practice Questions

Q1
If 10 grams of NaCl are dissolved in water, how many moles of NaCl are present? (Molar mass of NaCl = 58.5 g/mol)
  1. 0.17 moles
  2. 0.5 moles
  3. 1.0 moles
  4. 1.5 moles

Questions & Step-by-Step Solutions

If 10 grams of NaCl are dissolved in water, how many moles of NaCl are present? (Molar mass of NaCl = 58.5 g/mol)
  • Step 1: Identify the mass of NaCl you have, which is 10 grams.
  • Step 2: Identify the molar mass of NaCl, which is 58.5 grams per mole.
  • Step 3: Use the formula to calculate moles: Moles = mass (g) / molar mass (g/mol).
  • Step 4: Plug in the values: Moles = 10 g / 58.5 g/mol.
  • Step 5: Perform the division: 10 divided by 58.5 equals approximately 0.171.
  • Step 6: Conclude that there are about 0.171 moles of NaCl present.
  • Mole Concept – Understanding the relationship between mass, molar mass, and the number of moles in a substance.
  • Molar Mass Calculation – Using the molar mass of a compound to convert grams to moles.
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