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

Answer and explanation

Correct answer: C. 4

  1. Step 1: To find the number of moles present in a chemical sample, divide the given mass by the substance's molar mass : .
  2. Step 2: For of with , the expression is .
  3. Step 3: Dividing the values produces .
Answer
4.
Why not the others: 5 is an overestimation arithmetic miscalculation; 8 doubles the molar quantity (); 2 halves the molar quantity (using double the molar mass).

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