This chemical equation appears to be incorrect. The correct balanced chemical equation for the reaction between copper (Cu) and nitric acid (HNO3) to produce copper(II) nitrate (Cu(NO3)2) and water (H2O) is:

3Cu + 8HNO3 → 3Cu(NO3)2 + 2NO + 4H2O

Please let me know if you have any other questions.