What is the molar mass of calcium carbonate ()? (Atomic masses: )
Answer and explanation
Correct answer: C. 100 g/mol
- Step 1: Identify the number of atoms of each element: 1 Ca, 1 C, and 3 O atoms.
- Step 2: Compute the molecular sum: .
Answer
100 g/mol.
Why not the others: '68 g/mol' computes with only 1 oxygen; '84 g/mol' computes with 2 oxygens (); '116 g/mol' adds an extra oxygen atom.
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