Question #6f2c6

in 2 moles of CO2 there are around $1.2044 \times {10}^{24}$molecules. Each CO2 molecule is made up of 3 atoms so the total number of atoms is approximately $3.6132 \times {10}^{24}$
The number of entities in a mole is given by the Avogadro constant, ${N}_{A}$, which is approximately $6.022 \times {10}^{23}$ entities per mol. For CO2 the entity is a molecule made up of 3 atoms.
Thus in 2 moles we have around, $2 m o l \times 6.022 \times {10}^{23} \textrm{m o \le c \underline{e} s} m o {l}^{-} 1$, which is $1.2044 \times {10}^{24}$molecules.
Each CO2 molecule is made up of 3 atoms so the total number of atoms is approximately $3.6132 \times {10}^{24}$