Answer:
120mph
Explanation:
Google
divide the speed value by 1.467
or
176 times 60 second in a minute times 60 minutes in an hour
than divide by 5280 the amount of feet in a mile
 
        
             
        
        
        
The percentage of Chromium in Chromium Oxide is calculated as follow,
Step 1:           Calculate Molar mass of Cr₂O₃,
Cr = 51.99 u
O = 16 u
So,
     2(51.99) + 3(16) = 103.98 + 48 = 151.98 u
Step 2:          Secondly divide molar mass of only chromium with total mass of Cr₂O₃ and multiply with 100.
i.e.
                   = 

 × 100                   
                   =
 68.41 %
So, the %age composition of chromium in chromium oxide is 
68.41 %.