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Draw a Data Flow Diagram (DFD) and an ER Diagram depicting a student enrolling in a university, adding, dropping, and finishing a class. Also, include the process of grading and all modular design components (sequence, selection, iteration).
in a certain reaction it was noticed that the reaction rate coefficient k depends upon temperature by an arrhenius
a student gently drops an object weighing 15.8 g into an open vessel that is full of ethanol so that a volume of
When dissolved in your stomach (pH=1) the concentration of aspirin (acetylsalicylic acid Ka = 3.0 x 10 ^-4) is 0.2 M. Calculate the % ionization of the aspirin.
Assuming that equal numbers of moles of each were released into the air at ground level, rank these four compounds in terms of their potential to catalytically destroy ozone in the stratosphere. Explain
what is the value of k using the equation delta Grxn=-RTlnk? (Assume -R is equal to -8.314 and T is 298K)
Calculate the theoretical yield of C2H5Cl when 138 g of C2H6 reacts with 244 g of Cl2, assuming that C2H6 and Cl2 react only to form C2H5Cl and HCl.
A 0.577g sample of a purified organic acid was dissolved in water and titrated potentiometrically. A plot of the data revealed a single end point after 23.39mL of 0.0994M NaOH had been introduced. Calculate the molar mass of the acid.
Based on the following test results, Define what conclusion can be drawn about the unknown solution here
Three pure compounds are formed when 1.00-{\rm g} samples of element X combine with, respectively, 0.472 {\rm g}, 0.630 g, and 0.789 g of element {\rm Z}. The first compound has the formula {\rm{X}}_2 {\rm{Z}}_3.
if solubility of a particular solute is 10g100g h2o at 20 degrees c which of the following solution concentrations
At what temperature would a 1.80 m NaCl solution freeze, given that the van't Hoff factor for NaCl is 1.9? Kf for water is 1.86 degrees C/m. answer in degrees C
The enthalpy of fusion of methanol (CH3OH) is 3.16 kJ/mol. How much heat would be absorbed or released upon freezing 25.6 grams of methanol?
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