What is the first step when measuring out an acid?

a. find the bottle it comes in and pour the acid into a graduated cylinder.
b. find the bottle it comes in and pour the acid into a beaker.
c. find the bottle it comes in and pour the acid into the solution you are making.
d. find the bottle it comes in and smell the bottle to make sure it is the correct acid.

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.

As changes in energy levels of electrons increase, the frequencies of atomic line spectra they emit

Heat energy, carbon dioxide, and water are released through which process? a. photosynthesis b. depolymerization c. digestion d. cellular respiration