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The value of delta H for 2CO(g) + O2 (g) = 2CO2(g) is -482 kJ. Calculate the heat released to the surroundings when 38.5 g of O2 (g) reacts with excess CO
David J hooper weighs out 13.1 grams of salicylic acid in a 250 mL flask and adds 7.5 mL of acetic anhyride (density=1.080 g/mL) Determine the max (theoretical number of grams) of acetlysalicylic acid he can prepare
How do I calculate the concentration of the lycopene solution in the spectrophotometer cell before isomerization, given that the molar absorptivity of lycopene at 471 nm is 1.86 x 10^4.
The world record for the marathon (26.2 miles) is 2:03:38 (hrs:min:s). Assuming constant velocities, calculate the corresponding wavelengths for each runner (be sure to label which is which).
Which one of the following substances will exhibit both dispersion and dipole-dipole forces between molecules in the condensed phase? (please explain why)
Solid NaI is slowly added to a solution that is .0075M Cu+ and a .0087 M Ag+. Which compound will precipitate first (NaI, CuI, or AgI), calculate [Ag+] when CuI just begins to precipitate
A mixture of propane and butane is fed into a furnace where it is mixed with air. The furnace exhaust leaves the furnace at 285°C, 761.0 mmHg and contains only N2, O2, CO2, and H2O.
suppose you chose phenolphthalein , which changes color at the end point from colorness(acidic) to pink at pH8.5 .Would you need the same , more or less volume of NaOH in the back-titration?
Consider the reaction given below. H2(g) + F2(g) 2 HF(g) (a) Using thermodynamic data from the course website, calculate G° at 298 K. kJ (b) Calculate G at 298 K if the reaction mixture consists of 7.3 atm of H2, 5.3 atm of F2, and 0.22 atm of HF.
Compound A (C11H16O) has a band in the IR spectrum at 3450 cm%u20131 (strong, broad) and does not react with pyridinium chlorochromate (PCC) in CH2Cl2
Write the balanced (i) molecular equation, and (ii) net ionic equation which show what happens when aqueous solutions of barium nitrate and potassium sulfate are mixed together. Identify the spectator ion(s) Is this correct
How much heat is absorbed when 5.53 mol of NH4NO3 solid is dissolved in water? (Heat of soluton = 25.7 kJ/mol)
Histidine has three ionisable functional groups. Write the equilibrium equations for its three ionizations and assign the proper pKa for each ionization.
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