edited by
Rod O'Connor Texas A&M University College Slation, TX 77843
"Some Quickies" Milton H. Rosenberg Pace Uniuersitv (Westchester Carnous). Pleasantuille, iV1;10570 1) Dr. Joseoh Priestlev. a Unitarian minister in Leeds. England, first prepared oxygen on August 1,1774, by heking mercury(I1) oxide. He did not use an oven, a steam line, or a grill. Robert Bunsen was born in 1811. What was the weather like in Leeds, England, on the day Oz was first prepared? 2) Assuming that coal is mostly carbon, with a density of 1.2 ~ m - can ~ , you fill an 8 oz bowl with a mole of coal without leaving a hole?
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4 4 / Journal of Chemical Education
3) Ignite a wooden splint. With a wide open mouth, blow. The flame goes out, leaving a glowing splint. Now blow again, with oursed l i ~ s The . solint erows briehter. Whv does blowing put out a fire in one case and cause an increase in the rate of combustion in the other?
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Answers (1) sunny. (2) no. (3) Astream of air canseparatethe "flame" (burning gases) from the fuel (splint), but a stream of air can also keep the Oz concentrationreplenished near the combustion area. [If you guessed that you can "blow hot or c o l d or selectively exhale Conor O2by changing the configurationof your mouth, you were wrong.]
To obtain detailed solurinns or ro submit problrms for "Rrain 'I'inglert," write to Dr. Rod O'Connur, 1)cpnrtmenl of Chrmijtry, Texas A & M I'nivwsiry. Cullcge Srnrion.TX 7 8 4 : i .
