On this educational page, we'll explore how to determine the initial reactants in a chemical reaction based on the given amounts of products and leftovers.**Chemical Equation:**\[\_\_ \, \text{C}_2\text{H}_2 + \_\_ \, \text{O}_2 \rightarrow \_\_ \, \text{CO}_2 + \_\_ \, \text{H}_2\text{O}\]**Legend:** - Gray = Carbon (C) - Red = Oxygen (O) - White = Hydrogen (H)**Question:** What are the amounts before the reaction?**Options:**| | C₂H₂ | O₂ ||---|------|----|| A | 2 | 10 || B | 12 | 10 || C | 10 | 9 || D | 8 | 4 |**Diagram Explanation:**The diagram depicts several molecules, representing a post-reaction scenario:- **Carbon Dioxide (CO₂):** Each molecule consists of one gray sphere (C) between two red spheres (O). - **Water (H₂O):** Each molecule consists of one red sphere (O) between two white spheres (H).Observe and count the quantities and arrangements of molecules to determine the appropriate initial reactant amounts from the given options.

The given chemical reaction is as follows: __C2H2 + __O2 → __CO2 + __H2O To solve the above problem count the moles of each compound present in the reaction mixture. Count the number of molecules given: C2H2=8O2=4CO2=4H2O=2 The balanced equation is as follows: 8C2H2 + 4O2 →4CO2 + 2H2O Hence, the amount before the reaction is is as follows: C2H2=8 and O2=4 Therefore the correct option is (D).