Two Oxides of a metal contain `30.0 and 27.6` per cent of Oxygen respectively. If the formula of the first Oxide be `M_(2)O_(3)`, find that of the second oxide.

Explanation

To find the formula of the second oxide of the metal, we will follow these steps:

### Step 1: Determine the percentage of the metal in the first oxide
Given that the first oxide has a formula of \( M_2O_3 \) and contains \( 30.0\% \) oxygen, we can calculate the percentage of the metal \( M \).

\[ \text{Percentage of metal} = 100\% - \text{Percentage of oxygen} = 100\% - 30\% = 70\% \]
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