Acertain volatile substance evaporates from an open container into a room of volume 1000 ft'. the evaporation rate is determined to be 200 mg/min. if the air in the room is assumed to be well mixed, how many ft/min of fresh air must be supplied to ensure that the concentration of the volatile is maintained below its tlv of 100 ppm? the temperature is 77°f and the pressure is 1 atm. assume a volatile species molecular weight of 100. under most circumstances the air in the room cannot be assumed to be well mixed. how would poor mixing affect the quantity of air required?

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 is the shape of the poem “peer” connected to its meaning?

Air can be considered a mixture. which statement does not explain why?