The empirical formula for copper(II)nitrite is:

Question

Quizplus · Accepted Answer

The empirical formula is the simplest whole number ratio of atoms in a compound. From the name, we know that the compound contains copper (Cu) and nitrite (NO2-) ions. We need to determine the ratio of Cu to NO2-.

First, we determine the charge on copper. Copper is found in group 11 of the periodic table and therefore has a charge of +2.

Next, we determine the charge on nitrite. The nitrite ion has a charge of -1.

To balance the charges, we need one copper ion for every two nitrite ions. Therefore, the empirical formula is Cu(NO2)2.

The correct choice is C as it is the only one that contains Cu and NO2-.

The Empirical Formula for Copper(II)nitrite Is