The following two reactions are possible methods for refining copper in the final step of a smelting process, i. e., getting pure copper (Cu) from copper ores found in rocks. Calculate the theoretical atom economy for each reaction. a. 2 CuO (s) + C (s) → 2 Cu (s) + CO2 (g)

b. CuO (s) + CO (g) → Cu (s) + CO2 (g)

3. Use your calculations from the previous question (i. e., 2a and 2b) to answer the following questions.
a. Which one of the methods for refining copper ore is greener according to the atom economy principle of green chemistry?

b. Why is a calculation of atom economy helpful in comparing two chemical reactions to
determine which one is greener? In other words, what does atom economy tell you about “greenness”?

c. What is another possible consideration from the principles of green chemistry that could tell you more about comparing the “greenness” of these two reactions?

4. How are the two ways of measuring the efficiency (atom economy and percent yield) of a reaction the same? How do they differ?

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most historians agree that gabriel mouton, the vicar of st. paul’s church in lyons, france, is the “founding father” of the metric system. he proposed a decimal system of measurement in 1670. mouton based it on the length of one minute of arc of a great circle of the earth (now called a nautical mile, 1852 meters). he also proposed the swing-length of a pendulum with a frequency of one beat per second as the unit of length (about 25 cm). a pendulum beating with this length would have been fairly easy to produce, thus facilitating the widespread distribution of uniform standards. over the years, his work was revised, improved, and extended by a number of french scientists.

the political sponsor of weights and measures reform in the french revolutionary national assembly was the bishop of autun, better known as talleyrand. under his auspices, the french academy appointed several committees to carry out the work of developing a usable system of weights and measures for france. one of the committees recommended a decimalized measurement system based upon a length equal to one ten-millionth of the length of a quadrant of the earth’s meridian (i.e., one ten-millionth of the distance between the equator and the north pole).

i think its 100.

hope this !