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30 November, 21:58

Which substance has the highest density at room temperature?

a. Hydrogen

c. Water

b. Oxygen

d. They are all the same

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  1. 30 November, 22:58
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    The correct answer is C. At same conditions, water is the substance with the highest density. Density of water at STP is 1000 kg/m^3, hydrogen is 0.09 kg/m^3 and oxygen is 1.43 kg/m^3. From the values, it is clear water has the highest density.
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