A current of 2.50 A is passed through a solution containing Cu+2 ions for 4.00 hours. Calculate the mass of Cu atoms that form at the cathode. Charge= current*time Convert the charge in coulombs to number of electrons. Since it takes two electrons per Cu+2 atom, divide the ...
May 17, 2007
How much electric charge is needed to produce 1.000kg of Na metal from the Na+ ions in NaCl? You need one electron per atom. How many atoms are present in 1kg of Na? Use avagradros number. To change to coulombs, remember that 1 electron= 1.6E-19C
May 17, 2007
human reason wedded to truth Is this a question? Are we supposed to somehow metaphysically know the question associated with this? Do you have any thinking on this matter? The "truth" is "human" and "reason" are very seldom associated much less &...
March 22, 2007
Describe the climate and physical characteristics of that biome and the types of organisms that live within it. Give examples of and describe symbiotic relationships between those organisms. Be sure to include at least one example from each of the following: parasitism, ...
February 13, 2007
For a dried flower arrangement, customers can choose from 2 types of containers, 3 sample designs, and 2 sizes. How many different arrangments does the shop offer? please post if possible in the by midnight tonight. Thank you
January 23, 2007
I'm in a Grade 12 Data Management Course. The Current unit is Factorials and Permutations. I'm having a trouble with this question. The answer is suppose to be 120 but I dont know how. How many different ways can 6 people be seated at a round table? Explain your ...
September 10, 2006
I need to know how to calculate what percentage of a number is to another. let me make that clearer, 35 is what percent of 48? how is that calculated? What you are asking is this: 35 is to 45 as x is to 100 or 35/48=x/100 solve for x x=.729 Now to get % you must multiply x by ...
August 21, 2005