In aqueous solution, hypobromite ion, BrO-, reacts to produce bromate ion, BrO3 -, and bromide ion, Br-, according to the following chemical equation.3 BrO-(aq) →→ BrO3 -(aq) + 2 Br-(aq)A plot of 1/[BrO-] vs. time is linear and the slope is equal to 0.056 M-1s-1. If the initial concentration of BrO- is 0.90 M, how long will it take one-half of the BrO- ion to react? In aqueous solution, hypobromite ion, BrO-, reacts to produce bromate ion, BrO3 -, and bromide ion, Br-, according to the following chemical equation.3 BrO-(aq)  BrO3 -(aq) + 2 Br-(aq)A plot of 1/[BrO-] vs. time is linear and the slope is equal to 0.056 M-1s-1. If the initial concentration of BrO- is 0.90 M, how long will it take one-half of the BrO- ion to react? 5.0 × 10-2 s 12 s 8.0 s 20. s

Consider this reaction: 2NH3 (g) → N, (g)+3H, (g) At a certain temperature it obeys this rate law. rate = (0.0324 Ms)[NH,] -1 Suppose a vessel contains NH, at a concentration of 1.37M. Calculate how long it takes for the concentration of NH, to decrease to 0.233 M. You may assume no other reaction is important. Round your answer to 2 significant digits. S x10

Which of the following reactions is impossible to occur as a single step? Cl2(g) --> 2 CI(g) OCI + H20(1) --> HOCI(aq) + OH NO(g) + Cl2(g) NOCI2(g) --> O 2 NO(g) + O2(g) 2 NO2(g) -->

The rate constant of a certain reaction is known to obey the Arrhenius equation, and to have an activation energy E,= 19.0 kJ/mol. If the rate constant of this a 8. - 1 -1 reaction is 2.5 × 10° M at 343.0 °C, what will the rate constant be at 310.0 °C? 'S Round your answer to 2 significant digits. - 1 - 1 k I| M •S x10

tter What solid was formed: Copper (II) ions (from CuSO4) react with solid Appearance of copper sulfate: Appearance of zinc: Appearance after 10 min: Appearance after 20 min: Balanced reaction: Type of reaction: 0 min Lab 5 pg. 3 Zinc metal Cu²+ (aq) + Zn () About 10-20 mL of copper sulfate solution are added to two beakers. Note the appearance of the solution. Zinc is added to one beaker (the other is reference control). Note the appearance after 10 and 20 minutes in comparison to 0 min. (reference control). 10 min CuSO4 (aq) + 20 min Zn (s) → Ed: January 2032 ZnSO4 (aq) + Cu (s) In general, salts are soluble in water. In some cases, the forces that hold the salt together are too strong for the water molecules to pull apart. These are called insoluble salts. You can tell if you have an insoluble salt by the formation of a precipitate when combining solutions of soluble salts, or a gas is evolved (observed as gas bubbles, or a foam). For the following reactions, the indicated solutions…

8 H chemPad H XX LE # Supporting Materials Periodic Table Additional Materials W 17 - Su2... → Help Greek Constants and W The reaction of fluorine and chlorine dioxide, shown below, is first order with respect to fluorine and first order with respect to chlorine dioxide. Write the rate law for this reaction. (Rate expressions take the general form: rate = k. [A]a. [B]b.) F₂(g) + 2 CIO₂ (g) → 2 FCIO₂(g) Factors G b * webassign.net 8 Supplemental Data L a ▸ G

Consider the initial-rate data at a certain temperature in the table for the reaction described by 2 NO₂(g) + O₂(g) → N₂O5 (g) + O₂(g) Determine the value and units of the rate constant, k. k = X10 TOOLS [NO2], (M) [03]o (M) 0.650 0.800 1.10 0.800 1.76 1.40 Units: Initial rate (M/s) 3.12 x 104 5.28 x 104 14.78 x 104

2. The decomposition reaction of HO2 is given by 4 HO, (g) → 2 H2O (g) + 3 O, (g). From the following kinetics data (concentration of HOz vs. time) and two figures below, answer the following questions. Time (min) [HO;] M (or mol/L) 0.0000 2.0000 1.2500 0.66667 0.5 2.5000 0.40000 3.7500 0.28571 In [ HO, ] 1 5.0000 0.22222 [ HO, 1 4.5 2. The reaction order of HO2 should -1 be order. 1.5 a) Zero-th b) First c) Second time (min) time (min) d) None of the above

Consider the following reaction: 5Br (ag) + BrO;¯(aq) + 6H*(aq) → 3Br,(aq) + 3H,O() If the rate of disappearance of Br(ag) at a particular moment during the reaction is 3.5×10 mol L-1s-1, what is the rate of disappearance of BrO (aq) at that moment? O 5.8x 10 mol Ls? 07.0x 10 mol Ls! 0 3.5x 10 mol Lis

In a study of the decomposition of hydrogen iodide on a gold surface at 150 °C HI(g)% H2(g) + ½ I½(g) the concentration of HI was followed as a function of time. It was found that a graph of [HI] versus time in seconds gave a straight line with a slope of -1.91×10-4 Ms and a y-intercept of 0.235 M. Based on this plot, the reaction is reaction is order in HI and the rate constant for the Ms!