The user wants me to analyze the chemical equations written on the blackboard.

Реакции:

1. \( 4Li + O_2 \rightarrow Li_2O \)
2. \( P + HNO_3 \rightarrow H_3PO_4 + NO + H_2O \)
3. \( Cu + H_2SO_4 \rightarrow CuSO_4 + SO_2 \uparrow + H_2O \)