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

Answer and explanation

Correct answer: A. 2

  1. Step 1: Apply the formula relating mass and amount of substance: .
  2. Step 2: Setting and , we have .
  3. Step 3: Carrying out the calculation gives .
Answer
2.
Why not the others: 4 doubles the molar quantity (); 1 halves the molar quantity (using double the molar mass); 3 is an overestimation arithmetic miscalculation.

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