1. How do CFCs illustrate that technical knowledge can be a "double edged" sword?
is chemistry often called the central science?
how you would set up an experiment to test the relationship between doing chemistry homework and the final grade received in the course. Apply a scientific approach to solving this problem. Label each of your steps appropriately.
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1. CFCs help in refrigeration but destroy the ozone layer when released into the atmosphere
2. A good knoledge of chemistry is needed to understand biology, medicine, pharmacy etc
3. You do this one
9) reaction: CH4 + 2O2 --> CO2 + 2 H2O a hundred g CH4 * (a million mol CH4 / sixteen g CH4) * (a million mol CO2 / a million mol CH4) * (40 4 g CO2 / a million mol CO2) = 275 g CO2 10) % yield =( fairly yield / theoretical yield )* a hundred % % yield = (40 5/ 275) * a hundred % = 11) a million mol = * 10^23 molecules a *10^24 molecules CH4* (a million mol CH4 / * 10^23 molecules CH4) * (sixteen g CH4/ a million mol CH4) = g CH4