Question
How many oxygen atoms are there in 1 mole of CO2? [Ans. 12.044 × 1023]
Answer
Step 1: Calculation of molar mass
Molar mass = 12 + 16 × 2 = 44
Step 2: Calculation of moles
Calculate the number of moles of oxygen atoms: In one mole of CO2, there are two oxygen atoms. Therefore, the number of moles of oxygen atoms in 1 mole of CO2 is:
Number of moles of O atoms = 2 moles CO2
Step 2: Calculation number of atom
Number of oxygen atoms = Number of moles of O atoms × Avogadro’s number
= 2 × 6.022 × 1023
= 12.044 × 1023 atoms
Therefore, there are approximately 12.044 × 1023 oxygen atoms in 1 mole of CO2.