The mass of CO = 112 g
The mole is the number of particles contained in a substance
1 mol = 6.02.10²³ particles
Moles can also be determined from the amount of substance mass and its molar mass
number of atoms in 88 g CO₂ :
[tex]\tt mass~O=\dfrac{2.16}{44}\times 88\\\\mol~O=\dfrac{mass~O}{Ar~O}=\dfrac{2.16.88}{44.16}=4\\\\number~of~atoms=4\times 6.02\times 10^{23}[/tex]
number of atoms in CO :
[tex]\tt mass~O=\dfrac{16}{28}\times mass~CO[/tex]
[tex]\tt mol~O=\dfrac{mass~O}{Ar~O}=\dfrac{16.mass~CO}{28.16}=\dfrac{mass~CO}{28}[/tex]
[tex]\tt number~of~atoms=\dfrac{mass~CO}{28}\times 6.02\times 10^{23}[/tex]
number of atoms in CO₂ = number of atoms in CO :
[tex]\tt 4\times 6.02\times 10^{23}=\dfrac{mass~CO}{28}\times 6.02\times 10^{23}\\\\4=\dfrac{mass~CO}{28}\\\\mass~CO=112~g[/tex]
