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A 8.45-L container holds a mixture of two gases at 33 °C. The partial pressures of gas A and gas B, respectively, are 0.415atm and 0.606 atm. If 0.190 mol of a third gas is added with no change in volume or temperature, explain what will the total pressure become?
a sample of chlorine gas occupies a volume of 946ml at a pressure of 726mmhg. calculate the pressure of the gas in in
Calculate the standard enthalpy. of formation of solid Mg(OH)2 using the following thermochemical info: Mg (s) + O2 ---> 2MgO(s) delta H = -1203.6 kj Mg(OH)2 (s) ----> MgO (s) + H2O (l) delta H = 37.1 kj 2H2 (g) + O2 (g) ----> 2H2O(l) delta H = -5..
What is the sum of the H-X-H bond angles (in degrees) in the following hydrides. BeH2, BH3, CH4 Calculate the bond angle for each molecule and add the three values to get your final answer.
Calculate the rms (average) speed of N2O atoms or molecules at 125 degrees Celsius. Use R = 8.314 kg-m2/K-s2-mol for the value of the gas constant.
Propose a synthesis of teflon (polytetraflauroethlene). What starting materials are required? What type pf reaction would be used to achieve polymerization
Calculate the number of moles of electrons needed to produce 5.12g of copper from the electrolysis of a solution of CuSO4.
What is the %Cu (by mass) in the metal oxide product formed when Cu2CO3(OH)2 decomposes upon heating above 200°C?
1.36 grams of pure anhydrous sodium carbonate was dissolved in distilled water and made up to 250.0mL. 20.00mL of this solution required a 19.60mL liter of a hydrochloric acid solution for complete neutralization. Compute the concentration of the ..
We did an experiment to isolate acetylsalicyclic acid from aspirin using methanol. We crushed the aspirin tablet before the extraction began. Why were we instructed to crush the aspirin tablet before proceeding
A radioactive element has a half-life of 2.2 hours. How many hours will it take for the number of atoms present to decay to one-sixteenth of the initial value? Show your calculations
a bottle of phosphoric acid is labeled 85 h3po4 by mass density 1.689 gcm3. calculate the molality h3po4 in the
A 26.0-g sample of ice at -11.0°C is mixed with 123.0 g of water at 90.0°C. Calculate the final temperature of the mixture assuming no heat loss to the surroundings.
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