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A 0.2044 g sample of potassium hydrogen phthalate (KHC8H4O4, a primary standard) was quantitatively transferred to a 100.00 mL volumetric flask and water was added to the mark.
What is the molarity of the solution?
How much energy in J must be added to 36.04g of solid water at -15 celcius degree to conver it to liquid water at 12 celcius
Compute the number of kilograms of hydrogen that pass per hour through a 5-mm-thick sheet of palladium having an area of 0.20 m2 at 500°C. Assume a diffusion coefficient
in a patient with insulin-dpendent diabetes mellitus who forgot to administer insulin, you would expect to see all of the following after a high sugar meal except
A 1.45 g sample of an iron ore is dissolved in acid and the iron obtained is (aq). To titrate the solution, 21.6 mL of 0.102 M KMnO4(aq) is required. What is the percent of iron in the ore? Hint: calculate moles of iron then mass of iron then % ir..
The vapor pressure of pure acetone (propanone) is 266 torr. When a non-volatile solute is added, the vapor pressure of acetone above the solution falls to 232 torr. What is the mole fraction of acetone in the solution?
Write a balanced equation for the neutralization of potassium hydrogen phthalate (C8H5O4K) with sodium hydroxide. Calculate the mass of potassium hydrogen phthalate that neutralizes 15 mL of an ~0.040 M NaOH solution.
Draw the skeleton structure of the repeating unit of the polyester made from this molecule via a condensation reaction
The average mass of a carbon atom is 12.011. Assuming you were able to pick up only one carbon atom, the chances that you would choose a carbon atom with a mass of 12.011 is:
an airplane is pressurized to 650 mmhg. The partial pressure of oxygen is 137 mmhg. If the partial pressure of oxygen drops below 100.mmhg.
Draw the structure of the organic product formed in the reaction of m - cresol with sodium hydroxide
A student prepares benzoic acid by hydrolyzing 6.47g of methyl benzoate (FW 136.15 g/mol) using excess sodium hydroxide. If the student recovers 3.71g of benzoic acid
A rigid tank with a volume of 2.5 m3 contains 15 kg of saturated liquid-vapor mixture of water at 75 0C . The water is heated. Determine the temperature at which the liquid in the tank is completely vaporized.
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