Answer: 4 x 10 ∧-2  moles of nitrogen.
Explanation:
The chemical formular for quinine is ; C20 H24 N2 O2
 As can be seen from the chemical formular;
1 mole of quinine contains 2 moles of Nitrogen
 Thus; 2.0 x 10 ∧-2 moles of quinine would contain
          2.0 x 10 ∧-2 x 2 = 4 x 10 ∧-2  moles of nitrogen.
  Therefore 4 x 10 ∧-2  moles of nitrogen are in 2.0×10−2mole of quinine        
 
        
             
        
        
        
Chloroethane is the answer
        
             
        
        
        
Electrolysis of water<span> is the </span><span>decomposition reaction, because from one molecule (water) two molecules (hydrogen and oxygen) are produced. Water is separeted into two molecules:
</span>Reaction of reduction at cathode: 2H⁺(aq) + 2e⁻<span> → H</span>₂(g<span>).
</span><span><span>Reaction of oxidation at anode: 2H</span></span>₂<span><span>O(l) → O</span></span>₂<span><span>(g) + 4H</span></span>⁺(<span><span>aq) + 4e</span></span>⁻.<span><span>
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A vessel that contains a mixture of nitrogen and butane has a pressure of 3.0 atm at 126.9 °C and a pressure of 1.0 atm at 0 °C. The mole fraction of nitrogen in the mixture is 0.33.
A vessel contains a gaseous mixture of nitrogen and butane. At 126.9 °C (400.1 K) the pressure is due to the mixture is 3.0 atm.
We can calculate the total number of moles using the ideal gas equation.

At 0 °C (273.15 K), the pressure due to the gaseous nitrogen is 1.0 atm. 
We can calculate the moles of nitrogen using the ideal gas equation.

The mole fraction of nitrogen in the mixture is:

A vessel that contains a mixture of nitrogen and butane has a pressure of 3.0 atm at 126.9 °C and a pressure of 1.0 atm at 0 °C. The mole fraction of nitrogen in the mixture is 0.33.
Learn more: brainly.com/question/2060778