You are testing an unknown liquid to determine its identity. first you heat the liquid and find that it turns to gas at 80 degrees celsius. then you add sodium to a small amount of the liquid to see if it reacts. last you try to burn the liquid to see if it is flammable.

which physical property of the
liquid did you test?

a. boiling point
b. ability to conduct electricity
c. combustibility
d. melting point

What volume of a 2.00 m stock solution of naoh is needed to prepare 150. ml of 0.40 m solution?

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.

What effect might melting sea ice have for people who live in coastal areas?