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A gas mixture with a total pressure of 750 mmHg contains each of the following gases at the indicated partial pressures: CO2, 253 mmHg ; Ar , 133 mmHg; and 02, 166 mmHg . The mixture also contains helium gas. What is the partial pressure of the helium gas? What mass of helium gas is present in a 11.o L sample of the mixture at 568 K?
a quanity of gas exerts a pressure of 98.6 kpa at a tempature of 22 degrees celcius. If the volume remains unchanged, what pressure will it exert at -8 degrees celcius
What is the molar mass of mixture A and mixture B? Show detailed work for first and best rating.
titration of the resulting solution required 36.43 mL of KMnO4 solution. Calculate the percentage of Fe and Cr in the alloy.
The decomposition of SO2CL2 to SO2 and Cl2 is first order in SO2CL2 and has a half-life of 4.1 hours. If you begin with 1.6 x 10^-3 moles of SO2CL2 in a flask, how many hours elapse until 2.00x10^-4 moles remain?
A 0.2527-g sample of a mixture of Mg(OH)2 and Al(OH)3 was treated with 50.00 mL of 0.225 mol L^-1 HCl(aq). The resulting solution required 13.73 mL of 0.176 mol L^-1 NaOH(aq) to neutralize the excess, unreacted HCl. What was the percentage by mass..
3.8 g of a hydrocarbon fuel is burned in a calorimeter that contains 234 grams of water initially at 25.00 ?C. After the combustion,the temperature is 26.55 ?C.
Write the decayreaction for this isotope and explain your prediction in terms of N/Zratio.
Nitrogen dioxide (NO2) cannot be obtained in a pure form in the gas phase because it exists as a mixture of NO2 and N2O4. At 25°C and 0.98 atm, the density of this gas mixture is 2.7 g/L.
The density of water at room temperature is less than the assumed 1.0 g/mL used in the calculations for determining the enthalpy of neutralization. How will this small (but real) assumption affect the reported enthalpy of neutralization for the st..
Estimate the amount of product that was lost in the filtrate, assuming that the volume of the reaction mixture was 1.0 mL when you collected the product by vacuum filteration.
How many grams of copper may be formed by the passage of 22,988 C through an electrolytic cell that contains an aqueous cuprous
Treat 250.0 g of Ca3(PO4)2 with 150.0 g of H2SO4. How many grams of superphosphate could be formed?
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