19. which of the following chemical equations represents
propane combusts?
a. 2 cshe (g) + 5o2 (g) → 3c02(g) + 4h20 (1)
b. 2 cshe (g) + 5o2 (g) → 3co2(g) + 3h20(1
c. cshe (g) + o2 (g) → co2(g) + h2o(1)
d. csha (g) + 5o2 (g) → 3co2(g) + 4h2o(1)

(option D. with the proviso that the subscripts of propane's chemical formula must be corrected)

Explanation:

Propane is the saturated hydrocarbon, alkane, with chemical formula C₃H₈ or CH₃CH₂CH₃.

The complete combustion of the hydrocarbons yield carbon dioxide (CO₂) and water (H₂O).

The chemical equation that represents this combustion is:

Once you balance it, you get:

        Left side           Right side

C         3                          3

H         8                          4×2 = 8

O        5×2 = 10               3×2 + 4 = 10

That equation corresponds to the option D. of the list, with the proviso that the subscripts of propane's chemical formula must be corrected

there is none because earth is stationary and flat.

hypostyle hall;