Final answer:
To calculate the number of oxygen atoms in CaCO₃ using dimensional analysis, you need to use Avogadro's number to convert moles to atoms of oxygen and divide the given mass of CaCO₃ by the molar mass to get moles of CaCO₃.
Step-by-step explanation:
The correct answer is d) Both a and c.
To calculate the number of oxygen atoms in CaCO₃ using dimensional analysis, you need to use Avogadro's number to convert moles to atoms of oxygen and divide the given mass of CaCO₃ by the molar mass to get moles of CaCO₃.
Example:
If you have 2 moles of CaCO₃, you can use Avogadro's number (6.022 × 10²³ atoms/mol) to convert moles to atoms:
2 mol CaCO₃ x (6.022 × 10²³ atoms/mol) = 1.204 × 10²⁴ atoms of CaCO₃
Then, you can calculate the number of oxygen atoms by multiplying the number of moles of CaCO₃ by the number of oxygen atoms per mole of CaCO₃:
2 mol CaCO₃ x (3 mol O/1 mol CaCO₃) = 6 mol O
Finally, use Avogadro's number to convert moles of oxygen to atoms:
6 mol O x (6.022 × 10²³ atoms/mol) = 3.6132 × 10²⁴ atoms of oxygen