Calculating the Number of Moles in 4g of CaCO3

How do you calculate the number of moles present in 4g of CaCO3?

The number of moles present in 4g of CaCO3 can be calculated by understanding the molar mass of the compound and using the atomic masses of calcium, carbon, and oxygen.

Understanding Atomic Mass:

Atomic Mass: The atomic mass of an element is the average mass of an atom of that element, measured in atomic mass units (amu).
  • The atomic mass of Ca (Calcium) is 40 g/mol.
  • The atomic mass of C (Carbon) is 12 g/mol.
  • The atomic mass of O (Oxygen) is 16 g/mol.

Calculating Moles of CaCO3:

To find the number of moles of CaCO3 in 4g of the compound, you need to break down the molecular formula and sum up the individual atomic masses.
  • CaCO3 contains 1 mole of Calcium, 1 mole of Carbon, and 3 moles of Oxygen.
  • The molar mass of CaCO3 is calculated as: 40 g/mol (for Ca) + 12 g/mol (for C) + 3 * 16 g/mol (for O) = 100 g/mol.

Final Calculation:

To calculate the number of moles in 4 grams of CaCO3, divide the mass of the compound by its molar mass. Number of Moles = Mass of Compound / Molar Mass Calculating for our case: Number of Moles = 4g / 100 g/mol = 0.04 moles. Therefore, there are 0.04 moles of CaCO3 present in 4 grams of the compound.
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