Questions: Classify the chemical equations as being balanced or not balanced. 2 CO+2 NO-2 CO2+N2 6 CO2+6 H2O-C6H12O6+O2 H2CO3-H2O+CO2 2 Cu+O2-CuO

Solution Steps

The first equation is:

\[ 2 \mathrm{CO} + 2 \mathrm{NO} \rightarrow 2 \mathrm{CO}_{2} + \mathrm{N}_{2} \]

• Carbon (C): 2 on the left, 2 on the right.
• Oxygen (O): 2 from CO and 2 from NO on the left, totaling 4; 4 from \(2 \mathrm{CO}_{2}\) on the right.
• Nitrogen (N): 2 from NO on the left, 2 in \(\mathrm{N}_{2}\) on the right.

All elements are balanced.

The second equation is:

\[ 6 \mathrm{CO}_{2} + 6 \mathrm{H}_{2} \mathrm{O} \rightarrow \mathrm{C}_{6} \mathrm{H}_{12} \mathrm{O}_{6} + \mathrm{O}_{2} \]

• Carbon (C): 6 on the left, 6 on the right.
• Hydrogen (H): 12 from \(6 \mathrm{H}_{2} \mathrm{O}\) on the left, 12 in \(\mathrm{C}_{6} \mathrm{H}_{12} \mathrm{O}_{6}\) on the right.
• Oxygen (O): 12 from \(6 \mathrm{CO}_{2}\) and 6 from \(6 \mathrm{H}_{2} \mathrm{O}\) on the left, totaling 18; 6 in \(\mathrm{C}_{6} \mathrm{H}_{12} \mathrm{O}_{6}\) and 2 in \(\mathrm{O}_{2}\) on the right, totaling 8.

Oxygen is not balanced.

The third equation is:

\[ \mathrm{H}_{2} \mathrm{CO}_{3} \rightarrow \mathrm{H}_{2} \mathrm{O} + \mathrm{CO}_{2} \]

• Hydrogen (H): 2 on the left, 2 on the right.
• Carbon (C): 1 on the left, 1 on the right.
• Oxygen (O): 3 on the left, 3 on the right.

All elements are balanced.

The fourth equation is:

\[ 2 \mathrm{Cu} + \mathrm{O}_{2} \rightarrow \mathrm{CuO} \]

• Copper (Cu): 2 on the left, 1 on the right.
• Oxygen (O): 2 on the left, 1 on the right.

Neither copper nor oxygen is balanced.

Final Answer