Answer: [tex]15.33\times 10^{23}[/tex] molecules.
Explanation:
According to avogadro's law, 1 mole of every substance weighs equal to its molecular mass and contains avogadro's number [tex]6.023\times 10^{23}[/tex] of particles.
To calculate the number of moles, we use the equation:
[tex]\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}=\frac{112g}{44g/mol}=2.54moles[/tex]
1 mole of [tex]CO_2[/tex] contains =[tex]6.023\times 10^{23}[/tex] molecules
2.54 moles of [tex]CO_2[/tex] contains =[tex]\frac{6.023\times 10^{23}}{1}\times 2.54=15.33\times 10^{23}[/tex] molecules.
Thus there are [tex]15.33\times 10^{23}[/tex] molecules in 112 g of [tex]CO_2[/tex]
