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What's The Weight Of One Liter Of Water?

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Aisha answered
The exact weight of one liter of water, according the present norms is 0.998 kg. It is normally taken as equal to 1 kg. Additionally it has a specific gravity of 1.0.
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Anonymous commented
1 kg of pure water at the temperature of its maximum density (3.98 °C) under a pressure of 1 atm takes up a volume of 1.000 028 dm^3. One liter is exactly the same as one kubic decimeter. That means that one liter of water weighs 0.999972 or 1.000 kg, thus not 0.998 kg as Aicha claims, although since Aicha doesn't specify the temperature and pressure under which the water exists, it is unclear what she means.

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