University of California Irvine

What is the concentration of Se2− in a 0.015 M solution of hydroselenic acid, H2Se? H2Se(aq)+H2O(l)↽−−⇀H3O+(aq)+HSe−(aq)    Ka1=1.29×10−4 HSe−(aq)+H2O(l)↽−−⇀H3O+(aq)+Se2−(aq)    Ka2=10.0×10−13 Report your answer in scientific notation. Report your answer with 3 significant figures.

What is the concentration of Se2− in a 0.015 M solution of hydroselenic acid, H2Se? H2Se(aq)+H2O(l)↽−−⇀H3O+(aq)+HSe−(aq)    Ka1=1.29×10−4 HSe−(aq)+H2O(l)↽−−⇀H3O+(aq)+Se2−(aq)    Ka2=10.0×10−13 Report your answer in scientific notation. Report your answer with 3 significant figures.

Under which conditions is Cl2 most likely to behave like an ideal gas. Explain: (a) 100 oC and 10.0 atm (b) 0 oC and 0.50 atm (c) 200 oC and 0.50 atm (d) 400 oC and 10.0 atm

What are the ratios of the effusion rates for the pairs of gases: (assume approximate masses of isotopes, i.e.: 14C ~ 14 g mol–1 or u) (a) N2 and O2: (b) H2O and D2O (D = deuterium = 2H): (c) 14CO2 and 12CO2: (d) 235UF6 and 238UF6:

Determine um, uav, and urms for a group of ten automobiles clocked by radar at speeds of 38, 44, 45, 48, 50., 55, 55, 57, 58 and 60. miles per hour, respectively.

What must be the molecular mass of a gas if its molecules are to have a root–mean–square speed at 25 oC equal to that of the M–16 rifle bullet?