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In a gas mixture, the partial pressures are argon 455 , neon 85 , and nitrogen 135 .What is the total pressure exerted by the gas mixture?
If the density of ethyl alcohol is 0.789 g/ml, how many quarts can be produced by the fermentation of 100.0 lbof sugar?
A 125.0g sample of copper is initially at 25.0oC. It absorbs 12.50 kJ heat from its surroundings. What is the final temperature to the nearest tenth degree? Specific heat copper = 0.3874 J/goC.
Phenolphthalein has a pKa of 9.7. It is colorless in its acid form and pink in its basic form. For each of the pH's listed, calculate the ratio and predict the color
25.0 mL of 1.00 M HCl at 24.3oC react with 25.0 mL 1.00 M NaOH in a styrofoam calorimeter whose calorimeter constant is 70 J/C. The final temperature is 31.8o C. Assume the density of the solution product is 1.00 g/mL and the specific heat of the ..
In a particular biological reaction taking place in the body at 37°C, the change in enthalpy was --135 kJ mol--1 and the change in entropy was --136 J K--1 mol--1. (a) Calculate the change in Gibbs energy (b) Is the reaction spontaneous? (c) ..
A fixed quantity of gas at 21 0C exhibits a pressure of 98 torr and occupies a volume of 5.22 L. Use Charles's law to calculate the volume the gas will occupy
Determine the molarity of a solution prepared by dissolving 4.50 mol of NH4Cl in sufficient water to make 2.00 L of solution.
Calculate the concentration of magnesium and calcium in ppm. Record your answers as ppm Mg2+, and Ca2+ espectively. For each answer indicate the ppm as CaCO3 also.
What was the chemical reaction in the body, and what substance in the liver was produced to help catalyze the reaction?
One major variation of the Wittig reaction is the Wittig-Horner reaction. The Wittig-Horner reaction uses triethylphosphate P(OEt)3 instead of PPh3
If nitrosyl bromide, NOBr, is 34 percent dissociated at 25°C and the total pressure is 0.25 atm, calculate Kp and Kc for the dissociation at this temperature.
What compound could be added to a 0.10 M KC2H3O2 solution to make it an effective buffer. Also, write a balanced chemical reaction for the addition
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