Acertain reaction has this form:   aa    bb. at a particular temperature and [a]0  = 2.00 x 10-2  molar, concentration versus time data were collected for this reaction and a plot of ln[a]t  versus time resulted in a straight line with a slope value of -2.97 x 10-2  min-1.how much time is required for the concentration of a to decrease to 2.50 x 10-3  molar? a.  70.03 minutesb.  0.0096 minutesc.  0.589 minutesd.  29.70 minutese.  100 minutes

The scheme below is from a series of reactions that are part of a synthesis of vitamin a. answer the following questions with reference to this scheme. (i) what is "reagent a"? (ii) draw a step-by-step mechanism which explains the formation of compound c from compound b (iii) which reagents would you use to form compound e from compounds c and d (reagents b and c)? for each reagent suggested above in (ii) explain the role of the reagent in the reaction to (iv) form compound e. you may wish to do this by drawing a mechanism. 1. addition of reagent a но reagent a 2. н,о" thо oh нон-с compound a. compound b. compound c .ch-оh 1. reagent b "сно 2. reagent c сh oh compound e. compound d.

Which of the following are good traits of a hypothesis? it will be able to be testedit can predict an outcomeit will explain the observationsall of these

Reduction is a reaction which results in a in electrons and a in positive charge of the atom or ion 1) a- loss 1) b- gain 2) a-increase 2) b-decrease