In the sl system of units, the mole is one of
seven base units. it is frequently used in
chemical calculations. however, a mole of
something is just a particular quantity of it. it is
not a unit of measure in the way that meters,
seconds, and kilograms are. calculations
performed with the number of moles of a
substance could also be performed with the
number of particles of a substance. based on
this information, do you think that the mole
should be considered a base unit in the si
system? explain why or why not.

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.

Given the following information: mass of proton = 1.00728 amu mass of neutron = 1.00866 amu mass of electron = 5.486 × 10^-4 amu speed of light = 2.9979 × 10^8 m/s calculate the nuclear binding energy (absolute value) of 3li^6. which has an atomic mass of 6.015126 amu. j/mol.

What is the compound name for the formula [ru(en)2cl2]2+ and [co(en)cl2br]-