Question

drag each statement to the correct location. classify the chemical equations as being balanced or not balanced. cao + 3c → cac₂ + co, na + h₂o → 2naoh + h₂, 4fe + o₂ → 2fe₂o₃, 2mg + o₂ → 2mgo

Explanation:

Step1: Check CaO + 3C → CaC₂ + CO

On the left - hand side: 1 Ca, 1 O, 3 C. On the right - hand side: 1 Ca, 1 O, 3 C. It is balanced.

Step2: Check Na + H₂O → 2NaOH + H₂

On the left - hand side: 1 Na, 2 H, 1 O. On the right - hand side: 2 Na, 4 H, 2 O. It is not balanced.

Step3: Check 4Fe + O₂ → 2Fe₂O₃

On the left - hand side: 4 Fe, 2 O. On the right - hand side: 4 Fe, 6 O. It is not balanced.

Step4: Check 2Mg + O₂ → 2MgO

On the left - hand side: 2 Mg, 2 O. On the right - hand side: 2 Mg, 2 O. It is balanced.

Answer:

Balanced: CaO + 3C → CaC₂ + CO, 2Mg + O₂ → 2MgO
Not Balanced: Na + H₂O → 2NaOH + H₂, 4Fe + O₂ → 2Fe₂O₃