Question 10
Which chemical species is an intermediate in the formation of the goal reaction?

C. C

Explanation:

Intermediates are species that are neither reactants nor products.

In this reaction;

Reactant = C3H8 and O2

Products = CO2 + H2O

From the options, the only element that is either the reactants nor products is;

C. C

chemistry sucks a**

explanation:

atomic number of carbon is 6

electronic configuration of carbon is 1s²2s²2p²

orbital diagram of carbon is as shown here in the image.