An irrelgular object with a mass of 118g displaces 25ml of water when placed in a graduated cylinder. what is the density

Density =  Mass of Object / Volume of water displaced.

The volume of water displaced is the same as the volume of the object.

Density =  118 g / 25 ml

             =    4.72 g/ml

But  1 liter =  1000 cm³
       1 mL  = 1 cm³

             Density =   4.72 g/ml = 4.72 g/cm³  

Hno3(aq) → h+(aq) + no3−(aq). picture ii best represents the strong acid hno3. strong acids are strong electrolytes

You would do 1500/4 and the answer is 375