Answer:
Explanation:
The ideal gases follow Boyle's law: at constant temperature pressure and volume are inversely related:
        
        
        
Subsituting and computing:
      
 
        
             
        
        
        
Answer:
Calcium 
Explanation:
is a silver-gray metal which takes its name from the Latin word calx, which means lime. It is the fifth most abundant element in the earth's crust and is widely distributed as limestone (CaCO3), quicklime (CaO) and calcium fluoride.
 
        
                    
             
        
        
        
Answer:6.94
Explanation:
Molar mass of CaCO3=40+12+16×3
 =40+12+48=100g/mol
Moles=mass of substance/molar mass
=97mg/100g=0.097/100=0.00097moles/L.
PH=-log[CaCo3]=-log(0.00097)=6.94
P.s it's log to base e