Scoring scheme: 3-3-2-1for each of your ncount trials, enter the number of moles of hydrogen gas evolved during the hydrolysis. remember to use the same sequence for the trials that you used when you originally entered the height of the liquid level. use the pressure and volume of h2and the ideal gas law with r = 0.0820574 l atm mol-1k-1. report 3 significant figures.

If a reactant was removed, did the new equilibrium system shift to make more reactants or more products?

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 method(s) do plants use to obtain nitrogen? select all that apply. absorb it from the atmosphere use bacteria to convert nitrogen to usable form obtain usable nitrogen compounds from the soil absorb nitrogen from water taken in at the roots