7. You have been asked to manufacture a solution of a drug that has good stability around pH 5.4. What mass of acetic acid and sodium acetate would you need to manufacture 1L of 50mM pH 5.4 acetate buffer that could be used to make the solution. The pka is of acetic acid is 4.6 and the RMM of acetic acid and sodium acetate are 60 and 82 respectively.

H2so4(aq) + mg(s)—> mgso4(aq) +h2(g) which substance is the acid in the reaction?

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.

In which phase(s) do the molecules take the shape of the container?