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03/11/2021 6:44 pm
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(a) What is the difference between the density and relative density of a substance?
(b) If the relative density of a substance is 7.1, what will be its density in SI units?
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03/11/2021 6:51 pm
(a) Density of a substance is defined as the mass of the substance per unit volume.
Density of substance = \(\frac{mass\;of\;substance}{volume\;of\;substance}\)
SI unit of Density is kg/m3.
The relative density of a substance is the ratio of its density to that of water.
Relative density of substance = \(\frac{Density\;of\;substance}{Density\;of\;water}\)
It has no units.
(b) Relative density of substance = \(\frac{Density\;of\;substance}{Density\;of\;water}\)
7.1 = \(\frac{Density\;of\;substance}{1000 kg/m^3}\)
Density of substance = 7.1 x 103 kg/m3
This post was modified 3 years ago by admin