A chemical reaction that produces water molecules is 2H 2 + O 2 2H 2 O This

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A chemical reaction that produces water molecules is

2H2 + O2 → 2H2O

This reaction releases 570 kJ for each mole of oxygen molecules that is consumed. The relativistic relation between mass and energy then implies that the mass of two hydrogen molecules plus the mass of one oxygen molecule is slightly larger than the mass of two water molecules. Find this mass difference.

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