Aweather balloon is infated to a volume of 26.5 l at a pressure of 745 mmhg and a temperature of 23.3 °c. the balloon rises in the atmosphere to an altitude where the pressure is 360. mmhg and the temperature is -13.7°c assuming the balloon can freely expand, calculate the volume of the balloon at this altitude.

48 Liters.

Explanation:

Combined gas law is the combination of Boyle's law, Charles's law and Gay-Lussac's law.

The combined gas equation is,

where,

= initial pressure of gas = 745 mmHg

= final pressure of gas =360 mmHg

= initial volume of gas = 26.5 L

= final volume of gas = ?

= initial temperature of gas =

= final temperature of gas =

Now put all the given values in the above equation, we get the final pressure of gas.

Therefore, the volume of the gas will be 48 Liters.

the best answer is d because the strong cohesion is caused by the ability of water molecules to undergo hydrogen bonding.

a is incorrect because when water solidifies, it becomes   ice, which expands and occupies a bigger volume for the same mass of water in its liquid state.

b is incorrect because water has high surface tension. besides bonding to itself it hydrogen bonds to other molecules at the top decreasing possibility for breaking of attractive forces.

c is incorrect because the water molecule has oxygen which is highly electronegative and so pulls the electron pair towards itself creating a dipole moment, making the molecule polar.

e is incorrect because water has strong adhesion, ability to stick to other molecules such as glass because of this molecules having stronger hydrogen bonding than water.