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What is the mass of 3 moles of NaCl? (2020) 2020

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Question: What is the mass of 3 moles of NaCl? (2020) 2020

Options:

  1. 87 g
  2. 58.5 g
  3. 174 g
  4. 3 g

Correct Answer: 174 g

Exam Year: 2020

Solution: 

Molar mass of NaCl = 23 + 35.5 = 58.5 g/mol. Mass = moles x molar mass = 3 moles x 58.5 g/mol = 174 g.

What is the mass of 3 moles of NaCl? (2020) 2020

Practice Questions

Q1
What is the mass of 3 moles of NaCl? (2020) 2020
  1. 87 g
  2. 58.5 g
  3. 174 g
  4. 3 g

Questions & Step-by-Step Solutions

What is the mass of 3 moles of NaCl? (2020) 2020
  • Step 1: Find the molar mass of NaCl. Sodium (Na) has a mass of 23 g/mol and Chlorine (Cl) has a mass of 35.5 g/mol.
  • Step 2: Add the masses of Sodium and Chlorine together: 23 g/mol + 35.5 g/mol = 58.5 g/mol.
  • Step 3: Use the formula to find the mass: Mass = moles x molar mass.
  • Step 4: Substitute the values into the formula: Mass = 3 moles x 58.5 g/mol.
  • Step 5: Calculate the mass: 3 x 58.5 = 174 g.
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