How many atoms of carbon are in a container that has 0.450 mol of CO2 and 2.55 mol of CaC2?

The number of carbon atoms in the container is 1.806 * 10²⁴ or the container contains 1.806 * 10²⁴ atoms of carbon

Explanation:

By Avogadro's number, 1 mole of a substance contains 6.02 * 10²³ particles of the substance

Here we have 0.45 mole of CO₂ contains

0.45 * 6.02 * 10²³ particles of CO₂ that is 2.709 * 10²³ particles of CO₂ or equivalent to 2.709 * 10²³ atoms of Carbon

Similarly, 2.55 moles of CaC₂ contains 2.55 * 6.02 * 10²³ particles of CaC₂ or 1.5351 * 10²⁴ atoms of Carbon

The total number of carbon atoms is therefore;

2.709 * 10²³ + 1.5351 * 10²⁴ = 1.806 * 10²⁴ atoms of carbon.