Balance the following skeleton equation.
`As_2O_3 + SnCl_2 + HCl to SnCl_4 + As + H_2O`

Explanation

To balance the skeleton equation `As2O3 + SnCl2 + HCl → SnCl4 + As + H2O`, we will follow these steps:

### Step 1: Count the number of atoms on both sides
First, we need to count the number of atoms of each element on the left-hand side (LHS) and right-hand side (RHS) of the equation.

- **LHS:**
- As: 2 (from As2O3)
- O: 3 (from As2O3)
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