Consider the following statements:
prediction: it will rain before monday
evening if it is cloudy when the sun goes
down on friday evening.
observation: every week for two months
the above prediction held true.
given this observation, should the
prediction be accepted as a fact?
a yes; an event that happens so frequently
is almost certain to continue to happen
regularly.
b yes; if a hypothesis holds true during
several observations, it is a scientific fact.
c no; the observations were not made in a
laboratory
no; the prediction should not be accepted
without additional observations.

the temperature of the gas, in k, not celsius.

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.

he uptake of drugs from the intestine is often strongly influenced by diffusion. for example, consider a water-insoluble steroid for treating inflammation that is solubilized in aggregates of detergent molecules, called micelles. these micelles, aggregates of 80 soap molecules, have a molecular weight of 24,000, a diameter of 2.6 nm, and a charge of -27. the positively charge ions (counterions) in this system are na".