I think is oxygen that what i think
        
                    
             
        
        
        
Answer:
The answer to your question is Single replacement
Explanation:
Types of reaction in Chemistry
Synthesis           two or more reactants combine to produce one single product
Decomposition       one reactant splits producing two or more products
Single replacement   One element replaces a similar one in a compound.
Double replacement  Two compounds interchange their cations and anions.
Combustion one compound reacts with oxygen to produce carbon dioxide and water.
Reaction given
                       Fe⁺²  +  CuSO₄  ⇒   Cu + FeSO₄
This is a single replacement reaction
 
        
                    
             
        
        
        
Answer:
Explanation:
Group one elements are alkali metals. All alkali metal have one valance electron. They loses their one valance electron and from cation with charge of +1.
Charges on group one.
Hydrogen = +1
Lithium = +1
Sodium = +1
Potassium = +1
Rubidium = +1
Cesium = +1
Francium = +1
Group two elements are alkaline earth metals. All alkaline earth metal have two valance electron. They loses their two valance electron and from cation with charge of +2.
Charges on group two.
Beryllium = +2
Magnesium = +2
Calcium = +2
Strontium = +2
Barium= +2
Radium = +2
Group 13 elements are boron family. All elements have three valance electrons. They loses their three valance electron and from cation with charge of +3.
Charges on group 13.
Boron = +3
Aluminium = +3
Gallium = +3
Indium = +3
Thallium= +3
Group 13 elements are also shows +1 charge by losing one valance electron.
 
        
             
        
        
        
Two moles of SO2 means 1.204x10^24 molecules, since there are 3 atoms in one molecule, multiply 1.204 x10^24 by 3 and you get 3.612x10^24.