25 moles of C3H8 will be produced from 75 moles of CO2.
To find the value of moles of a product from the number of moles of a reactant, it is necessary to observe the stoichiometric ratio between them:
[tex]C_3H_8 + 5 O_2 = > 3 CO_2 + 4 H_2O[/tex]
Analyzing the reaction, it is possible to see that the stoichiometric ratio is 1:3, so we can perform the following expression:
C3H8 CO2
[tex]\frac{1mol}{xmol} =\frac{3mol}{75mol}[/tex]
[tex]x = 25mol[/tex]
So, 25 moles of C3H8 will be produced from 75 moles of CO2.
Learn, more about mole calculation in: brainly.com/question/2845237