The mass of CO = 112 g
Further explanation
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
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number of atoms in 88 g COâ‚‚ :
![\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}](/tpl/images/0869/3295/a4896.png)
number of atoms in CO :
![\tt mass~O=\dfrac{16}{28}\times mass~CO](/tpl/images/0869/3295/4a267.png)
![\tt mol~O=\dfrac{mass~O}{Ar~O}=\dfrac{16.mass~CO}{28.16}=\dfrac{mass~CO}{28}](/tpl/images/0869/3295/badb7.png)
![\tt number~of~atoms=\dfrac{mass~CO}{28}\times 6.02\times 10^{23}](/tpl/images/0869/3295/b0ef8.png)
number of atoms in COâ‚‚ = number of atoms in CO :
![\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](/tpl/images/0869/3295/cc4ae.png)