Question

the mass of an Empty density bottle is 30 gram, it is 75 gram when filled completely with water and 65 gram when filled completely with a liquid. Find the (a)volume if density bottle (b)density of liquid
(c)relative density of liquid

Answer 1

HEY
HERE IS YOUR ANSWER
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Relative density=density of liquid(d1)/density of water at 4℃(d2)
also density is directly proportional to mass
therfore d1/d2=m1/m2
now m1=35
and m2=mass of liquid-mass of empty bottle=45
relative density=35/45=0.77

now
0.77=density of liquid/density of water
density of liquid=0.77*1
density of liquid=0.77g/cm^3

density=mass/volume
volume=35/0.77
volume=45cm^3
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Answer 2

Answer:

mass of an empty density bottle= 30g(m3).

mass of the bottle when filled with water= 75g (m1).

mass of bottle when filled with a liquid= 65g(m2).

mass of water=m1-m3= 75g-30g=45g.

mass of the liquid= m2-m3= 65g-30g= 35g.

relative density of liquid= mass of liquid/mass of water=35g/45g

                                                                                               =0.77.

density of liquid= 0.77*density of water(universal formulae of density of water at 4  degree)

                          =0.77*1g/cm3.

final answer:

density of liquid is 0.77g/cm3.

relative density of the liquid is 0.77.