Question

directions: select all the correct answers. which of the following equations are balanced correctly? cu + h₂o → cuo + h₂ 2c₄h₁₀ + 13o₂ → 8co₂ + 10h₂o 2ag₂o → 4ag + o₂ zn + hcl → zncl₂ + h₂

Explanation:

Step1: Check Cu + H₂O → CuO + H₂

On the left - hand side: 1 Cu, 2 H, 1 O. On the right - hand side: 1 Cu, 2 H, 1 O. It is balanced.

Step2: Check 2C₄H₁₀ + 13O₂ → 8CO₂ + 10H₂O

Left - hand side: C: 2×4 = 8, H: 2×10 = 20, O: 13×2 = 26. Right - hand side: C: 8, H: 10×2 = 20, O: (8×2)+(10×1)=26. It is balanced.

Step3: Check 2Ag₂O → 4Ag + O₂

Left - hand side: Ag: 2×2 = 4, O: 2. Right - hand side: Ag: 4, O: 2. It is balanced.

Step4: Check Zn + HCl → ZnCl₂ + H₂

Left - hand side: 1 Zn, 1 H, 1 Cl. Right - hand side: 1 Zn, 2 H, 2 Cl. It is not balanced.

Answer:

Cu + H₂O → CuO + H₂, 2C₄H₁₀ + 13O₂ → 8CO₂ + 10H₂O, 2Ag₂O → 4Ag + O₂