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The standard molar heat of vaporization of her water is 40.79 kJ per mole. What mass of mass of steam is required to release 500 kilojoules of heat energy upon condensation?
The Kc for the reaction of hydrogen and iodine to produce hydrogen iodide equals 54.3 at 430 C. Calculate the quilibrium concentrations of H2,I2, and HI if the intial concentrations are H2=I2=0M and HI=.525M.
liquid octane will react with gaseous oxygen to produce gaseous carbon dioxide and gaseous water. suppose 74 grams of octane is mixed with 148 grams of oxygen
54.0 mL of a 1.40 M solution is diluted to a volume of 218 mL. A 109-mL portion of that solution is diluted using 183 mL of water. What is the final concentration.
A mono methyl-substituted 1-naphthol is permitted to couple with a diazonium prepared from a mono-substituted hydroxyaniline. Explain how many different coupling products can be acquired assuming all patterns of the starting materials are availabl..
An experiment requires 43.0 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?
an element has ccp packing with a face-centered cubic unit cell. its density is 11.4 gml and the unit cell volume is
a 25.00-ml sample of an unknown h3po4 solution is titrated with a 0.100 m naoh solution. the equivalence point is
Which value is closest to the pOH of a 0.30M solution of the weak base methylamine (CH_3_NH_2_). The Ka for the acid form of methylamine (CH_3_NH_3_+) is 2.27E-11.
What is the silver ion concentration in a solution prepared by mixing 457 mL of 0.373 M silver nitrate with 475 mL of 0.442 M sodium phosphate?
The lethal inhalation dose of sarin for a 200lb person has been determined to be 0.0015 mg. Determine the LD50 of sarin that researchers used to calculate this lethal inhalation dose.
how many grams of sulfur dioxide could be formed in a mixture of 128 grams of sulfur and 100 grams of oxygen are mixed and ignited.
Determines the mass of an unknown gas to be .43 grams at 37 C as well as 720 mm Hg in a 250 mL container. Explain what is the molecular mass of the unknown gas. Use n=(PV/RT) but a little confused on where to proceed.
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