Question

# The mass of an empty density bottle is 21.8 when filled completely with water it is 41.8 g and when filled completely with liquid it 40.6 g . Find : (a) the volume of density bottle. (b)the relative density of liquid.

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Solution

## Density of water is 1 g Cm3 ∴ Volume of density bottle = weight of water in grams completely filling the bottle (a) Volume of density bottle: Mass of empty density bottle = M1 =21.8 g Mass of bottle + water = M2 41.8 g ∴ Mass of water completely fih1ig the density bottle = M2 — M1 =41.8 —21.8 20g But 1 g of water has volume = 1 cc ∴ Volume of bottle (density bottle) = volume of water =20 c.c. =20 ml (b) The relative density of liquid: Mass of 20 c.c. of liquid = (mass of density bottle + mass of 20 c.c of liquid- mass of density bottle) = 40.6—21.8 = 18.8 g Mass of 20 C.C of water = 20g Relative density of liquid

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