Question
Complete and balance the following equation:
$Cu + HNO_3 \rightarrow NO_2$_ + ________+ _________
$Cu + HNO_3 \rightarrow NO_2$_ + ________+ _________
✓
Answer
$Cu + 4HNO_3 \rightarrow Cu(NO_3)_2 + 2NO_2 + 2H_2O$
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