question 8 of 10 which of the following is an organic molecule? a. oxygen gas b. sucrose c. iron oxide d…

Brief Explanations:

Organic molecules contain carbon - hydrogen bonds. Oxygen gas ($O_2$) is an element, iron oxide ($Fe_2O_3$) is an inorganic compound, water ($H_2O$) is an inorganic compound. Sucrose ($C_{12}H_{22}O_{11}$) is a carbohydrate and contains carbon - hydrogen bonds, making it an organic molecule.

Answer:

B. Sucrose