The chemical formula for magnesium sulfate is MgSO4, so it shows that there are four atoms of oxygen but not sulfur. There is only one atom of sulfur in the formula
        
             
        
        
        
Answer: Evaporation Condensation is used to seperate the parts of a mixture 
Explanation: This is because it is the first order of the distilation process
 
        
             
        
        
        
In mordern periodic table there are all element given in modern periodic table
        
                    
             
        
        
        
Answer:
0.007 M
Explanation:
pH is defined as the negative logarithm of the concentration of hydrogen ions.
Thus,  
pH = - log [H⁺]
The expression of the pH of the calculation of weak acid is:-
Where, C is the concentration = ?
Given, pH = 3.45
So, for 
, 

C = 0.007 M
 
        
             
        
        
        
C.) Action force unless it has potential/stored enerygy