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Pure n-butane is contained in an isothermal pressure cell in which the volume can be varied. The cell is maintained at 200oF as well as the volume is changed until the first drops of liquid n-butane form. Explain what is the pressure of the cell? The volume is decreased until the cell is essentially full of liquid n-butane with one a few bubbles of n-butane gas remaining. Explain what is the pressure of the cell?
Four different amino acids can be combined in different sequences to form how many different tetrapeptides?
Calculate the acid dissociation constant Ka, for the ammonium ion (NH^4+); Kb for NH3 is 1.8 x 10^-5
When 2-chloro-2-methylbutane is treated with a variety of strong bases, the products always seem contain two isomers (A and B) of formula C5H10.
NaCl is an electrolyte that commonly used to melt ice by lowering its melting point. what is the lowest possible melting point for ice that could be obtained considering the solubility of NaCl in water? The Kf for H2O is 1-86 degree C/m.
determine the boiling point of a solution that contains 78.8 g of naphthalene c10h8 molar mass 128.16 gmol dissolved
Assume that the complete combustion of one mole of ethanol to carbon dioxide and water liberates 1370 kJ/mol (?G°\' = -1370 kJ/mol). If the energy generated by the combustion of ethanol is entirely converted to the synthesis of a hypothetical comp..
How many grams of KHP are needed to exactly neutralize 27.4 mL of a 0.235 M potassium hydroxide solution ?
In deoxyhemoglobin, Iron atom lies ~0.36 to 0.40 out of the plane of the heme group whereas in oxyhemoglobin it lies of the porphyrine plane. Give reason for this behavious. Talk in terms of coordination number, size and the oxidation state of the..
In countries where potassium iodide is added to salt, iodine deficiency or goiter has been almost completely eliminated. The recommended daily allowance (RDA) for iodine is 150 pg/day.
vitamin d responsible for strong bones has a molar mass of 384and is known to be 84.4 carbon. how many carbon atoms are
What is the pH of a buffer that results when 0.50 mole of Na3PO4 is mixed with 0.75 mole of HCl and diluted with water to 1.00 L? The acid dissociation constants for phosphoric acid
Three gases (8.00g of methane, , 18.0g of ethane, , and an unknown amount of propane, ) were added to the same 10.0L- container. At 23.0 degrees Celcius , the total pressure in the container is 5.40atm . Calculate the partial pressure of each gas ..
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