Three grams of oxygen are adsorbed on 1.2 g of charcoal powder at 300K and 0.7 atm. Express the mass number of moles and volume of oxygen at 300K, 0.7 atm and at STP adsorbed per gram of the adsorbent.

Explanation

To solve the problem step by step, we will follow these calculations:

### Step 1: Identify the Mass of Adsorbate and Adsorbent
- Mass of adsorbate (Oxygen) = 3 g
- Mass of adsorbent (Charcoal powder) = 1.2 g

### Step 2: Calculate the Mass of Oxygen Adsorbed per Gram of Adsorbent
To find the mass of adsorbate per gram of adsorbent:
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