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What is the formula for calculating the number of moles from mass and molar mass

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Question: What is the formula for calculating the number of moles from mass and molar mass? (2023)

Options:

  1. moles = mass × molar mass
  2. moles = mass / molar mass
  3. moles = molar mass / mass
  4. moles = mass + molar mass

Correct Answer: moles = mass / molar mass

Exam Year: 2023

Solution: 

The correct formula is moles = mass / molar mass.

What is the formula for calculating the number of moles from mass and molar mass

Practice Questions

Q1
What is the formula for calculating the number of moles from mass and molar mass? (2023)
  1. moles = mass × molar mass
  2. moles = mass / molar mass
  3. moles = molar mass / mass
  4. moles = mass + molar mass

Questions & Step-by-Step Solutions

What is the formula for calculating the number of moles from mass and molar mass? (2023)
  • Step 1: Identify the mass of the substance you have. This is usually measured in grams.
  • Step 2: Find the molar mass of the substance. This is the mass of one mole of that substance, usually found on the periodic table or in chemical data.
  • Step 3: Use the formula: moles = mass / molar mass. This means you divide the mass you have by the molar mass you found.
  • Step 4: Calculate the result to find the number of moles.
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