Select the correct definition of a compound's boiling point. a. the point at which the temperature of the compound exceeds the temperature of its surrounding environment
b. the point at which the temperature of the compound in degrees Celsius exceeds the atmospheric pressure in torr
c. the temperature at which the compound's vapor pressure falls below the pressure of its surrounding environment
d. the temperature at which the compound's vapor pressure is equal to the pressure of its surrounding environment

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.

How many atoms are there in 5.70 mol of mg

The polymer used for the nonstick surface of cooking utensils is 24.0%c and 76%f by mass. what is the empirical formula of this polymer?