the mass of a density bottle is 25gm when empty.50gm when filled with water and 365gm when filled with mercury. find the density of mercury.

Let the volume of bottle = x

Then density of water = (50-25) /x

                              = 25/x

Density of mercury = (365-25)/x

                          = 340/x

Now,

relative density = density of substance / density of water

                       = (340/x)/(25/x)

                       = 340x/25x

                       = 340/25

                       =13.6

Therefore, relative density of mercury is 13.6

So, actual density of mercury is 0.0136 kg/l