Constructed Response Use the diagram below and your knowledge of
science to help you answer Question 6. Write
your answer on a separate sheet of paper.
Solute
particles
Fresh water
Salt water
6. At temperatures below 0°C, fresh water on
the surface of a lake is frozen while a nearby
body of salt water is not frozen. Explain this
observation in terms of what happens to water
molecules when water freezes.

Two nitro no2 groups are chemically bonded to a patch of surface. they can't move to another location on the surface, but they can rotate (see sketch at right). it turns out that the amount of rotational kinetic energy each no2 group can have is required to be a multiple of ε, where =ε×1.010−24 j. in other words, each no2 group could have ε of rotational kinetic energy, or 2ε, or 3ε, and so forth — but it cannot have just any old amount of rotational kinetic energy. suppose the total rotational kinetic energy in this system is initially known to be 32ε. then, some heat is removed from the system, and the total rotational kinetic energy falls to 18ε. calculate the change in entropy. round your answer to 3 significant digits, and be sure it has the correct unit symbol.

In the following redox reaction which is the oxidizing agent and which is the reducing agent? alcl3 + na nacl + al oxidizing agent = reducing agent =

Which of the following describes a situation where competition between producers exists