Give answer of all 4

Dear student, 
1.Density of a substance is mass * volume
2.The density of water is maximum at 4°C
3.The density of mercury in Si units, whose relative density is 13.6 is 13,600 kg/m.
 4.If the density of aluminium is 2700 kg/m, it is equal 2.79 g/cm.

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