Explain the following: Water is a liquid at room temperature. lee floats on liqu

Question

Explain the following: Water is a liquid at room temperature. lee floats on liquid water. Water has an exceptionally high boiling point. Describe the natural process that replenishes supplies of freshwater. CO_2 dissolves in water to produce H_2CO_3 in the same way that SO_2 produces H_2SO_3. Confirm by calculation that the pH of CO_2-saturated water at 25 degree C is 5.6, given that the CO_2 concentration in air is 365 ppm. For carbon dioxide, the Henry's law constant K_H= 3.4 Times 10^-2 M atm^-1 at 25 degree C. The K_a for carbonic acid, H_2CO_3, is 4.5 Times 10^-7. Recalculate the pH for a carbon dioxide concentration of 560 ppm, i.e., double that of the preindustrial age. Write balanced nuclear equations for the following: Emission of a beta particle by a magnesium-28 nucleus Emission of an alpha particle by a lawrcncium-255 nucleus c. Emission of a p particle by a nickcl-65 nucleus The concentration of PBDEs in herring gull eggs from the Great Lakes was about 1100 ppb in 1990 and about 7000 ppm in 2000. What is the doubling time for the PBDEs in this source? If past trends continue, what will be the concentration in 2010?

Explanation / Answer

1.a) Water is a liquid at room temperature because of hydrogen bonding .

     Hydrogen bond is the strongest bond.This keeps water molecules close.

b) The density of ice is less than water. So ice floats on liquid water.

c) Water has high boiling point because of

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