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A sample of 27.1 L of HF gas at 10.0 °C is heated at constant pressure until it fills a volume of 88.6 L. What is the new temperature, in °C?
Predict the proton NMR spectrum expected for CH3CHBrCH3. Indicate the proton responsible for the observed peak. Sketch the spectrum.
Draw the Lewis structure for SO42- and determine the formal charge on all 5 atoms in this polyatomic anion.
Supppose that a 1 L solution is made from 226 mg of citric acid (C6H8O7).What is the molarity of citric acid?
The half-life of the zero order reaction A ? B is 0.56 minutes. If the initial concentration of A is 3.4 M, what is the rate constant in M/s?
You have 2.00 L KH2PO4 of 1.00 M solution and 1.50 L K2HPO4 of 1.00 M solution, as well as a carboy of pure distilled H2O . How much 1.00 M KH2PO4 will you need to make this solution
A 0.2254 g sample of naphthalene (C8H10, 128.16 g/mol) was burned in a bomb calorimeter with a heat capacity of 2.18 kJ/K, and the temperature increased by 4.16°C. What is the molar enthalpy of combustion for this compound
The Kf for Cu(en)2^2+ is 1 x 10^20. What is the concentration of Cu^2+ (aq) in the solution?
If a laser operated on the n=5 to n=2 transition of a H atom, what wavelength in nm photon would be emitted? (E2= -82 kJ/mol, E1= -328 kJ/mol)
An aqueous solution contains a mixture of Cl- and I-. A buret is used to slowly add a solution of Ag+. Will AgCl or AgBr precipitate first
1.) What conclusions can you make about the relationship between the volume of a gas and its pressure?
A 13.00 g sample of an ionic compound NaA, where A- is the anion of a weak acid, was dissolved in enough water to make 100.0 mL of solution and was then titrated with 0.100 M HCl. After 550.0 mL of HCl was added, the pH was 5.00.
You observea ?T of 6.3 C. Assume a 4.18 J/g C specific heat for thesolution. Calculate the heat evolved in the neutralization.
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