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Tablets from a bottle of commercial aspirin gave a negative test with FeCl3. Several months later, tablets from the same bottle gave a positive test with FeCl3. How do you account for this result? Why?
solid NaI is slowly added to a solution that is 0.010 M in Cu+ and 0.010 M in Ag+. which compound will begin to precipitate first?
A sample of oxygen gas is collected over water at 25 degrees C. and a total pressure of 654 torr. The volume of gas collected is 500 mL. What mass of oxygen is collected? The vapor pressure of water is 25 degrees C at 23.8 torr.
Iodine-131 is used in the form of sodium iodide to treat thyroid cancer. The isotope has a 1/2 life of 8.05 days
If 0.25 mol of Br2 and .55 mol of Cl2 are introduced to a 3.0 L container at 400K, what will be the equilibrium concentration of Br2?
what is the equation for ninhydrin test of egg white?
Compute ΔU for the transformation; a = 0.136 m6Pa mol-2 ; b = 0.0391 L/mol.
Given the concentration of either hydrogen ion or hydroxide ion, use the ion product constant of water to calculate the concentration of the other ion at 298K.
Determine theoretical yield, limiting agent and excess reagent - How much excess reagent remains after the reaction goes to completion
Describe the characteristic infrared absorption frequencies that would allow you to distinguish between the following pairs of compounds.
a solution is prepared by dissolving 20.0 g of NaI in enoug water tomake 300.mL of solution How many moles of ions are in 25.mL of thesolution?
Calculate the pH of the resultant solution of mixing together two solutions of 2 L of 1.0 M acetic acid
What mass (in grams) of O2 is contained in a 555 mL volume at a pressure of 760.0 torr, and at a temperature of 400.0 K?
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