A scientist adds different ammounts of salt to 5 bottles of water. She then measures how long it takes for the water to boil. What is the responding variable in this experiment? a. The brand of salt used b. The amount of salt added to the water c. The time it takes for the water to boil d. The kind of bottles used

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.

Compare and contrast solutions and suspensions

Amixture with the same composition throughout is!