The normal boiling point of mercury (Hg) is 356.7 °C. At what temperature (in °C) would the vapor pressure of mercury be 0.2000 atm? (∆Hvap = 58.51 kJ/mol)

the vapor pressure of mercury at 322°C is 0.521 atm

Explanation:

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the density(ratio between mass and volume as m/v) decreases from top to bottom in periodic table group as the size increases and nuclear charge decreases. but in periods density increases from left to right as atom size decreases and nuclear charge increases.