E. true-false classify each of these statements as always true, at; sometimes true, st; or never true, nt. 26. two small bicycle pumps are filled with different gases; one contains he, the other ar. using the same pressure, it will take longer to force out the he than the ar. nt 27. theoretically, an ideal gas will contract in volume with increasing pressure and reduced temperature until absolute zero is reached. at 28. to obtain a value for the number of moles using the ideal gas law, one uses the conditions of stp. 29. the kinetic energy of a moving body is directly proportional to the square of its velocity. st

What is the most stable monatomic ion formed from nitrogen

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.

What best discribes the relationship between wavelength and frequency in a electromagnetic wave