This is the balanced chemical equation for the reaction between copper(II) carbonate and sodium hydroxide, which forms copper(II) hydroxide and sodium carbonate.

CuOH)2CO3 + 2NaOH -> 2Cu(OH)2 + Na2CO3

1 molecule of copper(II) carbonate reacts with 2 molecules of sodium hydroxide to form 2 molecules of copper(II) hydroxide and 1 molecule of sodium carbonate.