A11.00 g milk chocolate bar is found to contain 7.500 g of sugar.
part a) how many milligrams of sugar does the milk chocolate bar contain? express in milligrams in 4 significant figures
part b) what will be the amount of sugar in milligrams if the size of the milk chocolate bar is reduced from 11.00 g to 3.000 g ? express in milligrams in 4 sig figs
part c) given that a 11.00 g milk chocolate bar contains 7.500 g of sugar, calculate the percentage of sugar present in 11.00 g of milk chocolate bar keeping in mind that the answer should have four significant figures (two decimal places).
express your answer numerically to 4 significant figures.

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.