The total number of moles of CO2 formed : 10
Further explanation
Given
Reaction
CaCO3(s) + 2HCl(aq) ⇒CaCl2(aq) + H2O( ) + CO2
(g)
20. moles of HCl
Required
moles of CO2
Solution
The reaction coefficient in the chemical reaction equation shows the mole ratio of the elements in the reactants and products
From the equation, mol ratio of HCl : CO2 = 2 : 1, so mol CO2 :
= 1/2 x mol HCl
= 1/2 x 20
= 10 moles
