Final answer:
To find the percent composition of CaCO3, calculate the mass of each element in the compound and divide it by the molar mass of CaCO3. Multiply the result by 100% to get the mass percent of each element.
Step-by-step explanation:
To find the percent composition of CaCO3, we need to calculate the mass of each element in the compound. The molar mass of CaCO3 can be determined by adding up the atomic masses of calcium (Ca), carbon (C), and oxygen (O). Ca = 40.078 g/mol, C = 12.011 g/mol, O = 15.999 g/mol.
Now, calculate the mass percent of each element:
Mass percent of Ca = (Mass of Ca / Molar mass of CaCO3) x 100%
Mass percent of C = (Mass of C / Molar mass of CaCO3) x 100%
Mass percent of O = (Mass of O / Molar mass of CaCO3) x 100%
Substitute the values and calculate the mass percent for each element:
- Mass percent of Ca = (1 x 40.078 g) / (40.078 g + 12.011 g + 3 x 15.999 g) x 100%
- Mass percent of C = (1 x 12.011 g) / (40.078 g + 12.011 g + 3 x 15.999 g) x 100%
- Mass percent of O = (3 x 15.999 g) / (40.078 g + 12.011 g + 3 x 15.999 g) x 100%
Calculate the values and you will find the mass percent of each element in CaCO3.