How many moles are present in of ? (molar mass )

Answer and explanation

Correct answer: A. 4

  1. Step 1: Use the fundamental mole formula relating mass and molar mass: .
  2. Step 2: Divide the given mass in grams by the compound's molar mass in g/mol.
  3. Step 3: Carrying out the division yields 4 moles.
Answer
4.
Why not the others: 5 adds 1 extra mole due to an arithmetic addition miscalculation; 8 doubles the correct mole count by doubling mass or halving molar mass; 2 halves the correct mole count by doubling the molar mass.

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