NUMERICAL A relative density bottle welah 20.9. When completely filled with water it weighs 25 , when filled with an unknown liquid it weighs ag. Calculate the relative density and find the unknown liquid
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1
Answer:
Relative density, or specific gravity, is the ratio of the density of a substance to the density of a given reference material. Specific gravity for liquids is nearly always measured with respect to water at its densest; for gases, the reference is air at room temperature.
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Answer:
Mass of empty R.D bottle = 26.4 gm
Mass of R.D bottle + water = 38.4 gm
Mass of R.D bottle + liquid = 35.4 gm
mass of only water = 38.4 -26.4 = 12 gm
Volume of 1 g of water = 1 cm
3
∴ Volume of 12 g of water = 12cm
3
Mass of only liquid = 35.4 - 26.4 = 9 gm
Volume of the liquid = 12cm
3
∴ Density of liquid =
Vol.ofliquid
Massofliquid
=
12cm
3
9g
=0.75g/cm
3
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