Question

If 4.9 kg of CO2 are produced during a combustion reaction, how many molecules of CO2 would be produced?

Answer 1

Answer:

6.7 x 10²⁶molecules

Explanation:

Given parameters

Mass of CO₂  = 4.9kg  = 4900g

Unknown:

Number of molecules  = ?

Solution:

To find the number of molecules, we need to find the number of moles first.

 Number of moles  = $\frac{mass}{molar mass}$

          Molar mass of CO₂  = 12 + 2(16)  = 44g/mol

   Number of moles  = $\frac{4900}{44}$  = 111.36mole

A mole of substance is the quantity of substance that contains the avogadro's number of particles.

       1 mole  = 6.02 x 10²³molecules

     111.36 moles  =   111.36 x 6.02 x 10²³molecules   = 6.7 x 10²⁶molecules