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Calculate: (a) The partial pressure of each component. (b) The mass fraction of methane. (c) The average molecular weight of the gas mixture. (d) The density of the gas mixture in kg/ m3. write the
The pressure gauge on a 20.0 m3 tank of nitrogen at 25 ?C reads 10 bar. Estimate the mass of nitrogen in the tank by : (a) Direct solution of the ideal gas equation of state. (b) Conversion from sta
The concentration of the first ion to precipitate (either Al3+ or Ca2+) decreases as its precipitate forms. What is the concentration of this ion when the second ion begins to precipitate
Calculate the solubility of copper (II) iodate in 0.56 M copper (II) nitrate. Ksp* is 7.4x10-8 M3.
Diphosphorus pentoxide is added to water Hydrogen sulfide gas is bubbled through a solution of silver nitrate
At a certain temperature, the solubility of potassium iodate, KIO3, is 41.1 g/L. Calculate its solubility product constant for this temperature.
Desalination of brackish water is achieved by evaporation. A fraction of feed water is sent through an evaporator and the other is bypassed. The fraction bypassed and the pure water leaving the evap
High-purity benzoic acid (C6H5COOH; delta H rxn for combustion= -3227 KJ/mol) is used as a standard for calibrating bomb calorimeters. A 1.221-g sample burns in a calorimeter
sample of an alloy at 93.0 degrees Celsius is placed into 50.0 g of water at 22.0 degrees Celsius in an insulated coffee-cup calorimeter with a heat capacity of 9.2 J/K. If the final temperature of
An unknown volume of water at 18.2 degrees Celsius is added to 21.6 mL of water at 35.0 degrees Celsius. If the final temperature is 23.5 degrees Celsius, what was the unknown volume
One piece of copper jewelry at 108 degrees Celsius has exactly twice the mass of another piece, which is at 44 degrees Celsius. Both pieces are placed inside a calorimeter whose heat capacity is neg
What is the pH of a 0.15 M solution of the weak base ammonia (NH3). The Ka of the conjugate acid is (NH4) is 5.6e-10.
A gaseous reaction occurs at a constant pressure of 50.0 atm and releases 67.9kJ of heat. Before the reaction, the volume of the system was 8.80L . After the reaction, the volume of the system was 2
Consider a 20 mol % mixture of hexane (P°=72kPa) in toluene (P°=35kPa). Calculate the fraction of hexane molecules that reside in the vapor above the solution.
Calcium and Magnesium carbonates occur together in the mineral dolomite. Suppose you heat a sample of the mineral to obtain the oxides,CaO and MgO, and then treat the oxide sample with HCl.
What is the reducing agent and what has been reduced? What quantity of iodine can be obtained if 20.0g of NaI is mixed with 10.0g of MnO2 ( and a stoichiometric excess of sulfuric acid)
The Carbohydrate content of a glycoprotein is determined to be 12.6, 11.9, 13.0, 12.7, 12.5 g of carbohydrate per 100 g protein in replicate analysis.
Analyze the groups bonded to the carbon of interest. Every H contributes +1, and every oxygen contributes -2. An -OH group contributes (-2 + 1 = -1). Ignore carbons bonded to the carbon of interest.
0.2356 g sample containing only NaCl and BaCl2 yielded 0.4637g of dried AgCl. Calculate the percent of each compound in the sample.
Calculate the molar concentration of HCl in a solution that has a specific gravity 1.185 and is 36.5% (w/w). Prepare from this bottle 1 L of 0.1 HCl solution. 25 mL of this solution titrated with 30
We could find out more information about ths reaction by studying the temperature dependence of the rate constant, k. These same experiments could be carried out at a lower temperature (ice bath) an
Solution boiled to remove CO2 and then the excess HClO4 back titrated with 13mL of dilute NaOH. In a seperate experiment 18.44 mL of HClO4 neutralized NaOH in a 16.0 mL portion. Calculate molarities
A perfect gas has a constant volume molar heat capacity of CV,m = 1.5× R, and a constant pressure molar heat capacity of Cp,m = 2.5× R. For the process of heating 4.50 mol of this gas wi
In the temperature range from 40 K to 90 K, a certain amount of liquid has a temperature dependent heat capacity that is given by Cp = 18.5 J K?1 + T × 0.24 J K?2. Determine the enthalpy chang