Convert 400 grams of water to liters
If you take the density of water to be 1000 kg/m3, then 400 g is 0.4/1000 = 4*10-4 m3
1 m3 = 103 litres so 400 g of water occupy a volume of 4*10-4*103 litres = 0.4 litres.
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