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A chemistry student needs to standardize a fresh solution of sodium hydroxide. She carefully weighs out 0.438 g of oxalic acid (H2C2O4), a diprotic acid that can be purchased inexpensively in high purity, and dissolves it in 0.250 L of distilled water. The student then titrates the oxalic acid solution with her sodium hydroxide solution. When the titration reaches the equivalence point, the student finds she has used 0.1265 L of sodium hydroxide solution. Calculate the molarity of the student's sodium hydroxide solution.
An ionic compound forms when aluminum (Z = 13) reacts with iodine (Z = 53). If a sample of the compound contains 1.23 x 1019 aluminum ions.
despite its name, is at least mildly toxic. The properly balanced mixture reacts to form K2CO3, N2, H2O and CO2. Write the balanced reaction and determine the mass of kno3 that should be mixed with 1.4 g of sugar to produce optimally balanced rock..
Professor Whoops attempts to make a 10^-7 M NaH2PO4 solution. The good professor accidently grabs the Na2HPO4 bottle. What pH did professor Whoops expect the solution to be. what was the actual pH of the solution as made
How many molecules of NO2 are needed to react with 0.250 mol of H2O? How many grams of HNO3 are produced when 60.0 g of NO2 completly reacts? How many grams of HNO3 can be produced if 225 g of NO2 is mixed with 55.2 g of H2O
Analysis with an elaborate instrument indicates that substance A contains two elements. Substance B and substance C react to give a new substance D. Substance E decomposes upon heating to give substance F and substance G. Heating substance H to 10..
At high pressures, real gases do not behave ideally. Use the van der waals equation and data in the text to calculate the pressure exerted by 18 gram of H2 at 20C in a 1.00L container.
aqueous solution has an osmotic pressure of 6.35 torr at 23.1 C. What is the molar mass of the protein.
Calculate how much energy in the form of heat is available from 100mL of this mixture and compare it with the amount from pure gasoline. assume the densities of ethanol and gasoline are
An experiment requires 44.0 of ethylene glycol, a liquid whose density is 1.114 . Rather than weigh the sample on a balance, a chemist chooses to dispense the liquid using a graduated cylinder. What volume of the liquid should he use?
Which of the following molecules do you think would be subject to the Pauli principle's effects on rotational levels? (Check all that apply) a. methane b. dihydrogen c. HCl d. water e. dinitrogen f. dinitrogen where one atom is isotope 14 and the ..
What are the equilibrium partial pressures? Nitrogen dioxide decomposes according to the reaction given below where Kp = 4.48 x10^-13
calculating theoretical yield for this experiment. It is a dehydration synthesis where one mol of hydrated salt yields 3 mol hydrates and 1 mol of anhydrous salt.
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