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A gaseous mixture of O2 and N2 contains 40.8 % nitrogen by mass. What is the partial pressure of oxygen in the mixture if the total pressure is 625 mmHg ? Express you answer numerically in millimeters of mercury.
Calculate the minimum volume of distilled water, in liters, necessary to completely dissolve a 7.5 g sample of AgBr (s) at 298K. The molar mass of AgBr is 188 g mol
a solution of aqueous sodium hydroxide (NaOH) was prepared as follows: 15.0g NaOH was dissolved in sufficient deionized H2O to yield 250ml of aqueous NaOH solution. what volume of the resulting NaOH solution contains 0.100 mol NaOH
A sample of 1.00 mol of perfect gas molecules, originally at 1.00 atm, with a molar heat capacity at constant pressure of 7/2 R is put through the following cycle:
A unit of heat energy that was formerly used frequently was the calorie (cal). Calculate the calorimeter constant for the coffee-cup calorimeter in terms of cal/g degrees C.
What is the wavelength of the most energetic photons produced by an X-ray tube using U = 24.3 kV potential difference
Determine Ssys separately for the volume and temperature changes and show that ?Ssys = 0 for a reversible adiabatic process. If the expansion had instead occurred irreversibly against a constant external
At high temperature, hydrogen and carbon dioxide will reversibly react to form carbon monoxide and water vapor. At 986oC there are 0.11mol of each product and 0.087mol of each reagent in a 1.00L flask. What is Kc under these conditions
The Calfhead stream (flow rate 0.05m3s-1) discharges into the Oxhead river (flow of 3.00 m3.s-1). It is proposed to discharge waste into the Calfhead stream but the EPA requires a stream mixing study be undertaken.
If it takes 526 J of energy to warm 7.40 g of water by 17 °C, how much energy would be needed to warm 7.40 g of water by 55 °C?
What molarity of aqueous sodium chloride solution can be expected to show the same conductivity as 0.0050 M aluminum sulfate at 12,500 units.
The concentration of ammonium ion in the solution of the salt called ferrous ammonium sulfate
Use balanced equations to determine whether either CuBr or Ca3(PO4)2 has a different solubility with a change in pH:
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