1, Whatis the -2B is rate H(A] with a rate constant of 0.0447 hr 8) A) 0.0645 hr
ID: 716524 • Letter: 1
Question
1, Whatis the -2B is rate H(A] with a rate constant of 0.0447 hr 8) A) 0.0645 hr B) 44.7 hr C) 0.0224 hr D) 15.5 hr E) 22.4 hr 9) The rate law for the rearrangement of CH NC to CHjCN at 800 K is Rate (1300 s 9) I(CH3NC]. What is the half-life for this reaction? A) 1.9 x 10-3s B) 7.69 × 10-4 s C) 1920 s D) 5.3 x 104s E) 520 s 10) 10) The rate constant for the reaction 3A- 4B is 6.00 x 10-3 L mol-Imin-1, How long will it take the concentration of A to drop from 0.75 M to 0.25 M A) 440 min B) 180 min C)5.0 x 102 min D) 5.5 x 10-3 min E)2.2 x 10-3 min 11) 11) Butadiene, C4Ho (used to make synthetic rubber and latex paints) reacts to C$H12 with a rate law of rate 0.014 L/(mols)[C4Ho2. What will be the concentration of C4Hs after 3.0 hours if the initial concentration is 0.025 M A)43 M B) 0.0052 M C) 0.0000 M D) 190 M E) 0.024 MExplanation / Answer
Ans 8
The reaction
3A = 2B
Rate law = k[A]
The given reaction is of first order reaction
Rate constant k = 0.0447 hr-1
Half life t1/2 =?
For first order reaction
t1/2 = 0.6932/k
= 0.6932/(0.0447 hr-1)
= 15.5 hr
Option D is the correct answer
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