A student sets up a reaction and calculates a possible yield of 55.9 grams of silver. If the student performs the reaction and the mass of actual silver obtained is 42.5 grams, what is the percent yield?
A) 26%
B) 36%
C) 76%
D) 86%
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OpenStudy (ilovebmth1234):
@sammyalabamy
OpenStudy (sammyalabamy):
how much silver is gone between the start and the end?
OpenStudy (ilovebmth1234):
im not sure this is the question they gave me
OpenStudy (sammyalabamy):
subtract the end result from the start first
OpenStudy (ilovebmth1234):
13.4
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OpenStudy (sammyalabamy):
now divide the start by the difference between the start and end
OpenStudy (ilovebmth1234):
4.171 would be that answer
OpenStudy (sammyalabamy):
the problem that i asked would by set up like 13.4/55.9
OpenStudy (ilovebmth1234):
0.23971377
OpenStudy (sammyalabamy):
subtract that from 1
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OpenStudy (ilovebmth1234):
0.76028623
OpenStudy (sammyalabamy):
move the decimal two places to the right
OpenStudy (ilovebmth1234):
76.028623
OpenStudy (sammyalabamy):
theres your answer
OpenStudy (ilovebmth1234):
C)76%
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OpenStudy (sammyalabamy):
yep
OpenStudy (ilovebmth1234):
mind helping m with one more?
OpenStudy (sammyalabamy):
sure
OpenStudy (ilovebmth1234):
When given an Activity Series list of elements, the most reactive elements are always found where?
A) at the top
B) at the bottom
C) in the middle
D) not enough information to determine
OpenStudy (sammyalabamy):
look up the activity series. it should tell you there
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