If an observed rate law is: rate = k[NO][Cl_2]^2, doubling the concentration of
ID: 525313 • Letter: I
Question
If an observed rate law is: rate = k[NO][Cl_2]^2, doubling the concentration of NO and halving the concentration of Cl_2 will have what effect on the reaction rate? (A) increase the rate by a factor of eight (B) leave the rate unchanged (c) double the rate (D) halve the rate The rate of consumption of C_3 H_6 is 0.45 M^-1_s. What is the rate of production of H_2 O. 2C_3 H_6 + 2NH_3 + 3O_2 rightarrow 2CH_2 CHCN + 6H_2 O (A) 0.15 M middot s^-1 (B) 0.45 M middot s^-1 (C) 1.35 M middot s^-1 (D) 2.70 M middot s^-1 Which energy diagram best matches an exothermic reaction with this mechanism? E + S rightwardsharpoonoverleftwardsharpoon ES (Fast) ES rightarrow E + P(Slow) The graph shows the charge in concentration with time for two chemical species. Which balanced equation and value of the equilibrium constant is consistent with the data? Equation Equilibrium Constant (A) x rightarrow 2Y K_c = 8 (B) X rightarrow 2Y K_c = 16 (C) 2X rightarrow Y K_c = 2 (D) 2X rightarrow Y K_c = 4 The half-life of^T_c, a radioisotope commonly used in nuclear medicine, is about 6 hours. How much of a 5.0 mu sample remains after days? (A) 0.02 mu g (B) 0.6 mu g (C) 0.8 mu g (D) 3 mu g Which compound has the highest molar solubility in a neutral solution? (A) Agl. K_sp = 8.5 times 10^-17 (B) BaCO_3, K_sp = 2.6 times 10^-9 (C) Fe(OH)_ K_sp = 2.8 times 10^-39 (D) ZnS, K_sp = 3 times 10^-23 Which will change the value of K_sp for silver azide, AgN_3? (A) Adding water to the solution. (B) Adding silver ions to the solution. (C) Removing azide ions to the solution. (D) Increasing the temperature of the solution. If solid Na_ 3PO_4 is added to a saturated aqueous solution of Ca_3(PO_4)_2 what will happen to the concentration of Ca^2+ in solution? (A) It will decrease. (B) It will increase. (C) It will be unchanged. (D) It will become equal to the PO^-3_4 concentration. A solution contains 0.002 M pn^2+ and 0.002 M Ag What happens when NaCl(s) is added to bring the chloride ion concentration to 0.01 M? (A) Neither PbCl_2 nor AgCl precipitate. (B) Both PbCl_2 and AgCl precipitate. (C) PbCl_2 selectively precipitates. (D) AgCl selectively precipitates. For Agl, the k_sp value is 8.5 times 10^-17 and for [Ag(CN)_2] the k_ value is 1.0 times 10^2. Which statement is true? (A) Agl is completely insoluble in a solution that contains CN^-. (B) Agl is less soluble in water than in a solution that contains CN^- (C) Agl is more soluble in water than in a solution that contains CN^-. (D) Agl is equally soluble in water and in a solution that contains CN^-.Explanation / Answer
45)
Since order of NO is 1, doubling [NO] will double the reaction rate
Since order of Cl2 is 2, halving the concentration of [CL2] will decrease reaction rate to 1/4 times
Combined effect will be:
new rate = 2*(1/4) old rate
= (1/2)*old rate
Answer: D
46)
from reaction ,
(1/2)*rate of consumption of C3H6 = (1/6)*rate of production of H2O
rate of production of H2O = (6/2)*rate of consumption of C3H6
rate of production of H2O = (3)*rate of consumption of C3H6
= 3*0.45 M.s-1
= 1.35 M.s-1
Answer: C
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