How many moles are present in of ? (molar mass )
Answer and explanation
Correct answer: B. 2
- Step 1: Recall the standard mole calculation formula: .
- Step 2: Insert the mass of and its molar mass : .
- Step 3: Calculating the quotient gives .
Answer
2.
Why not the others: 3 is an overestimation arithmetic miscalculation; 1 halves the molar quantity (using double the molar mass); 4 doubles the molar quantity ().
Practise more Mole concept.
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