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

Answer and explanation

Correct answer: C. 4

  1. Step 1: The amount of substance in moles is defined by the relation , where is the mass of the sample and is the molar mass.
  2. Step 2: Substitute the given mass and molar mass for : .
  3. Step 3: Evaluating the division yields .
Answer
4.
Why not the others: 8 doubles the molar quantity (); 2 halves the molar quantity (using double the molar mass); 5 is an overestimation arithmetic miscalculation.

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