Ch3coch3 + br2 h+ 20140509164609authoringinterface ch3coch2br + h+ + br− the rate of disappearance of bromine was measured for several different concentrations of acetone, bromine, and h+ ions at a certain temperature: [ch3coch3] (m) br2 (m) [h+] (m) rate of disappearance of br2(m/s) (1) 0.650 0.0650 0.0650 5.18 × 10−5 (2) 0.650 0.130 0.0650 5.18 × 10−5 (3) 0.650 0.0650 0.130 1.04 × 10−4 (4) 0.865 0.0650 0.260 2.75 × 10−4 (5) 0.865 0.0650 0.0650 6.89 × 10−5

If the density of water is 1.0 g/cm3, which of these materials would float in water, based on their densities? check all that apply. aluminum cork iron lead wax

Why is soap used to remove grease? a. its nonpolar end dissolves the grease. b. it makes the water bond with the grease. c. it chemically bonds with the grease. d. its polar end dissolves the grease. correct answer for apex - a, its nonpolar end dissolves the grease.

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.