Calculate the number of moles of `Cu` and `HNO_(3)` to give `NO` and `NO_(2)` in the `(2:1)` molar ratio.

Explanation

To solve the problem of calculating the number of moles of copper (Cu) and nitric acid (HNO₃) needed to produce nitrogen monoxide (NO) and nitrogen dioxide (NO₂) in a 2:1 molar ratio, we can follow these steps:

### Step 1: Write the Balanced Chemical Equation
The first step is to write down the balanced chemical equation for the reaction between copper and nitric acid. The reaction can be represented as:

\[ \text{Cu} + \text{HNO}_3 \rightarrow \text{Cu(NO}_3\text{)}_2 + \text{NO} + \text{NO}_2 + \text{H}_2\text{O} \]

### Step 2: Balance the Reaction
...