At the city museum, child admission is $5.40 and adult admission is $8.70 . On Thursday, three times as many adult tickets as child tickets were sold, for a total sales of $693.00 . How many child tickets were sold that day?
September 24, 2014
Your team performed replicate analyses of a sample and obtained an average 18.54 mM concentration with a relative standard deviation of 4.0%. If you later discover that a systematic error was made by a factor of 2 and the mean concentration should have been 9.27 mM, what is ...
September 16, 2012
Two trains, each having a speed of'34 km,/h, are headed at each other on the same straight track. A bird that can ﬂy 58 km /h ﬂies oﬁ" the front of one train when they are 102 kmapart and heads directly for the other train. On reaching theother ...
September 17, 2011
why do you need to construct a calibration curve when doing spectrophotometric determinations? Is it not possible to obtain the concentration of the unknown solution by simply getting the extinction coefficient of the species under study and then determine its concentration in...
January 5, 2010
what is the significance of partial molar enthalpy of mixing? I tried to search the net but I did not get anything. I also tried to look at our textbook, which by the way, is by Peter Atkins but I find it insufficient. Please help me...
July 13, 2008
how can i get the critical temperature of CO2 given a set of data which consists of surface tension and density at different temperatures. The table looks like this: T(oC) density surface tension 0 0.927 4.50 20 0.772 1.16 I really need some help about this...please...
July 5, 2008