Question

Calculate the mass of

Answer 1

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

 

number of atoms in 88 g CO₂ :

$\tt mass~O=\dfrac{2.16}{44}\times 88\\\\mol~O=\dfrac{mass~O}{Ar~O}=\dfrac{2.16.88}{44.16}=4\\\\number~of~atoms=4\times 6.02\times 10^{23}$

number of atoms in CO :

$\tt mass~O=\dfrac{16}{28}\times mass~CO$

$\tt mol~O=\dfrac{mass~O}{Ar~O}=\dfrac{16.mass~CO}{28.16}=\dfrac{mass~CO}{28}$

$\tt number~of~atoms=\dfrac{mass~CO}{28}\times 6.02\times 10^{23}$

number of atoms in CO₂ = number of atoms in CO :

$\tt 4\times 6.02\times 10^{23}=\dfrac{mass~CO}{28}\times 6.02\times 10^{23}\\\\4=\dfrac{mass~CO}{28}\\\\mass~CO=112~g$