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Thursday, November 8, 2007

Thurs Nov 8

SCH 3U
% Yield
% Yield Questions
Review
TEST TOMORROW

SNC 1P
Microscope Quiz
Microscope Wet Mounts and Stains of Live Cells

Don't forget, B226 tomorrow

8 comments:

>. said...

Ms. I forget how to do this..
" A hydrate of CaSo4 is found to be 20.8 % water. Calculate the hydrate"s formula. " Would you please show me how to do this? Thanks.

MsWiens said...

two ways possible

0.208 = 18.02x/[Molar Mass CaSO4 + 18.02x]

then group like terms and solve for x

Or 100-20.8 = %CaSO4 and all the other questions were in that format.

Mumen said...

p193 #2,3 ->how would we answer them?

├lΛЩ€eD said...

Is the Carbon-Hydrogen Combustion Analyzer on the test?

MsWiens said...

For Q 2 re-read p. 164-165

For #Q3 it is the same as Q1 p. 170 which was assigned for homework and discussed in class

No C-H Analyzer Q's on test

Unknown said...

Ms.. why are we being rushed into this test.. like why cant we wait after mid term.

MsWiens said...

You are not being rushed into this test. We have covered all the material required for this test. The only reason it was ever a possibility to do it Monday was that Biology was going to be on Friday. Since Biology was moved, we are able to have it at the original time.

You may feel rushed if you haven't been keeping up with your work as you should have been.

MsWiens said...

For those that post comments - this section is to ask questions regrading Chemistry problems example: can you help me answer Q x on p. # - NOT complain how you didn't do the required work for the unit.

If students insist on wasting my personal time at home on such matters, the comment functions will be disabled.