The following calculation is based on the following assumptions: 1. The composition of air is 78% Nitrogen, 20.95% O2 and 0.93% Ar. 2. Air is an ideal gas: i.e. Obeys the equaiton PV = nRT. The mass of 1 L of air at a pressure of 1 atmosphere and at 25oC is 1.18 g.
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Water.
1 liter of H2O at 4 degrees C has a mass of exactly 1000 grams 1 liter of H2O at 4 degrees C has a mass of exactly 1 kilogram
density = mass divided by volume volume = mass divided by density V = M/D = 1kg/D whre D is density in kg/liter and one liter is 1000 cubic centimeters
1 kilogram per litre.
Density of water is 1000kg/m3. Also, Volume = Mass/Density = 1/1000 = 0.001m3. So, volume of water that has mass of 1 kg is 0.001m3.