Question

Propane burns in oxygen to produce carbon dioxide and water. What are the chemical formulas of the reactants and products?

Answer 1

Propane is 3 carbon chain, "di" oxide means two oxygen. Balance the equation by adding coefficients to make the the number of atoms the same on either side.

Reactants ---> Products
C3H8 + 5O2 ---> 3CO2 + 4H2O

Answer 2

For this question its the 3rd option

"The formulas of the reactants are C3H8 and O2. The formulas of the products are CO2 and H2O. "

Step-by-step explanation:

This is followed by a second question:

What is the chemical equation for the burning of propane if all the products and reactants are in the gas phase?

The answer to this one is the 2nd option

"C3H8(g) + 5O2(g) → 3CO2(g) + 4H2O(g) "

I hope this helps! Have a good day!