Question

if 5.7 kg of CO2 are produced duuring a combustion reaction, how many molecules of CO2 would be produced?

Answer 1

Ans :

Mass of CO2 = 5.7 kg = 5700 g

moles of CO2 = mass / molar mass

= 5700 g / 44.01 g/mol

= 129.5 mol

each mol CO2 has 6.022 x 10²³ molecules

so number of molecules of CO2 produced will be : 129.5 mol x 6.022 x 10²³ molecules/mol

= 7.8 x 10²⁵ molecules