How many moles are in 100 grams of CaCO3?

How many moles are in 100 grams of CaCO3?

Correct Answer: 1 mole

Step 1: Identify the chemical formula of the compound, which is CaCO3 (calcium carbonate).
Step 2: Calculate the molar mass of CaCO3 by adding the atomic masses of its elements: calcium (Ca), carbon (C), and oxygen (O).
Step 3: Find the atomic mass of calcium (Ca), which is approximately 40 g/mol.
Step 4: Find the atomic mass of carbon (C), which is approximately 12 g/mol.
Step 5: Find the atomic mass of oxygen (O), which is approximately 16 g/mol. Since there are 3 oxygen atoms in CaCO3, multiply 16 g/mol by 3.
Step 6: Add the atomic masses together: 40 g/mol (Ca) + 12 g/mol (C) + 48 g/mol (3*O) = 100 g/mol.
Step 7: Use the formula for calculating moles: Number of moles = mass / molar mass.
Step 8: Substitute the values: Number of moles = 100 g / 100 g/mol.
Step 9: Calculate the result: Number of moles = 1 mole.

Molar Mass Calculation – Understanding how to calculate the molar mass of a compound by summing the atomic masses of its constituent elements.
Mole Concept – Applying the mole concept to determine the number of moles from a given mass using the formula: moles = mass / molar mass.