Mass difference of reaction enthalpy 2 (thermo-31)

On Wikipedia (https://de.wikipedia.org/w/index.php?title=%C3%84quivalenz_von_Masse_und_Energie&oldid=245822194) is used for: Einstein's theory of mass transformation is that when the Earth warms up, 50 Degree Celsius of one cubic metre of water (assumption: mass) 1 Tonne) is a Mass increases by 2.3 Give me the microgram.
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