18.1 Balance the following redox equations by the ion-electron method: (a) H2O2 Fe2 Fe3 H2O (in acidic solution) (b) Cu HNO3 Cu2 NO H2O (in acidic solution) (c) CN- MnO- 4 CNO- MnO2 (in basic solution) (d) Br2 BrO- 3 Br- (in basic solution) (e) S2O2- 3 I2 I - S4O2- 6 (in acidic solution)

Butadiene undergoes a reaction at a certain temperature in the gas phase as follows: 2c4h6(g) --> c8h12(g) the following data were collected for this reaction: time (min) [c4h6] (m) 0 0.36 15 0.30 30 0.25 48 0.19 75 0. determine the order of the reaction and the rate constant. 1st order and k = 4.3x10 -4 s-1 1st order and k = 2.3x10-4 s-1 2nd order and k = 4.3x10-4 s-1 2nd order and k = 2.3x10-4 s-1 zero and k = 4.3x10-4 s-1

Select all of the statements which are true. electrons are located in shells or orbits around the atom. electrons orbit slowly around the atom. electrons travel in one flat path around the nucleus of an atom. the valence of an atom is determined by the number of electrons in the atom's outermost shell.

Increasing the substrate concentration in an enzymatic reaction could overcome which of the following? a) the need for a coenzymeb) allosteric inhibitionc) competitive inhibitiond) insufficient cofactors