Question

Formula for relative density is density of substance upon density of water so why in the question we take density of substance upon density in air -density in water Question - a substance weighs 80g in air and 68 g in water . Calculate its relative density

Answer 1

R.D=Wair/Wair-Wwater
R.D=80/80-68
R.D= 80/12
R.D=6.67
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