Question

write a formula from each name.
part 1 of 5
cuprous nitrate:
part 2 of 5
chromium(ii) nitrite:

Explanation:

Part 1 of 5: Cuprous Nitrate

Step 1: Identify ions

Cuprous is $Cu^+$ (copper(I) ion), nitrate is $NO_3^-$.

Step 2: Balance charges

To balance $+1$ (from $Cu^+$) and $-1$ (from $NO_3^-$), we need 1 $Cu^+$ and 1 $NO_3^-$.

Step 1: Identify ions

Chromium(II) is $Cr^{2+}$, nitrite is $NO_2^-$.

Step 2: Balance charges

The charge of $Cr^{2+}$ is $+2$, and $NO_2^-$ is $-1$. To balance, we need 1 $Cr^{2+}$ and 2 $NO_2^-$ (since $2\times(-1) = -2$ to balance $+2$).

Answer:

$\boldsymbol{CuNO_3}$

Part 2 of 5: Chromium(II) Nitrite