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A flask contains 30.5 g of oxygen gas, 45.7 g of sulfur dioxide gas and 23.9 g of fluorine gas. If the total pressure of the flask is 1.45 atm, what is the partial pressure of sulfur dioxide gas in the flask?
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Integrated Rate Laws: Working with Zero Order Reactions Experiments have shown the following reaction to be zero order with a rate constant = 2.50 10-1 M/sec. A → B + 2 C If you started with [A] = 2.600 M, how many minutes until the concentration of A = 2.300 M? .02 Correct: Your answer is correct. minutes How many minutes until the concentration of C reaches equals 0.899999999999999 M? 1.73 Incorrect: Your answer is incorrect. minutes
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A solution is prepared by mixing 25.0g pentane with 75.0g hexane. The density of the solution is 0.65g/mL. Determine the molarity and the molality of the solution.
*Please be as thorough as possible without skipping any steps. Thank you!
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A voltaic cell has one half-cell with a Cu bar in a 1.00 M Cu2+ salt and the other half-cell with a Cd bar in the same volume of a 1.00 M Cd2+ salt.
(a) Find E o cell , ΔG o , and K. Report your answers to the correct number of significant figures.
E o cell = V
ΔG o = × 10 J
K = × 10
(b) As the cell operates, [Cd2+] increases; find E cell when [Cd2+] is 1.95 M.
E cell = V
(c) Find E cell , ΔG, and [Cu2+] at equilibrium.
E cell = V
ΔG = J
[Cu2+] = × 10 M
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Using the sample in question 3, how many counts per second would be observed when the detector is 10 meters away from the sample? 5. If a 10 gram sample of a radioactive substance has a half-life of 6000 years, how much would be present after 8000 years? 6. If Nitrogen-14 absorbs an alpha particle and then emits a Hydrogen-1, what is the resulting nucleus? 7. If Au-185 emits an alpha particle, what is the nucleus formed? 8. What nucleus emits an alpha particle and forms Th-234? 9. If Th-234 emits a beta particle, what nucleus is formed? 10. If Nitrogen-14 absorbs a neutron and then emits a Hydrogen-1, what nucleus is formed
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Calculate the change in Gibbs free energy for each of the following sets of ΔH∘rxn, ΔS∘rxn, and T.
ΔH∘rxn=− 132 kJ ; ΔS∘rxn= 260 J/K ; T= 310 K
ΔH∘rxn= 132 kJ ; ΔS∘rxn=− 260 J/K ; T= 310 K
ΔH∘rxn=− 132 kJ ; ΔS∘rxn=− 260 J/K ; T= 310 K
ΔH∘rxn=− 132 kJ ; ΔS∘rxn=− 260 J/K ; T= 563 K
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A. Calculate KP at 298 K for the reaction NO(g)+12O2(g)→NO2(g) assuming that ΔH∘R is constant over the interval 298-600 K.
B. Calculate KP at 486 K for this reaction assuming that ΔH∘R is constant over the interval 298-600 K.
Thank you
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1. How many grams of ethylene glycol, C2H4(OH)2, are needed per kilogram of water to protect radiator fluid against freezing down to -10°C?
2. For benzene, C6H6, the freezing point constant, Kf, is 5.12 K oC/m and its normal freezing point is 5.5°C. What is the freezing point of a solution containing 100.0 g of benzene and 20.0 g of naphthalene (C10H8)?
3. When 5.0 g of an unknown substance is dissolved in 100.0 g of water, the freezing point of the solution decreases by 1.5°C. What is the molar mass of the unknown substance if the compound does not dissociate to form ions in solution?
4. If 2.00 moles of a substance is dissolved in 1.00 kg of water, the freezing point of the solution decreases by 7.44°C. Does this substance dissociate to form ions in solution? Explain why.
5. Calculate the freezing point of a 0.2 m CaCl2 aqueous solution, assuming it dissociates completely to form ions in solution.
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At 25ºC the osmotic pressure of an aqueous CaCl2 solution is 9545.4 torr; the solution has a density of 1.71 g/mL. Calculate the new boiling point of this solution in Celsius. Assume the normal boiling point of water is 100ºC. (MMCaCl2 = 110.984 g/mol; Kb, H2O = 0.512 ºC/m; Kf, H2O = 1.86ºC/m)
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I've literally asked this question 4 times now... its pretty sad people can't read as smart as they are to be able to answer these questions....
What amount of energy is required to change a spherical drop of water with a diameter of 1.60 mm to SIX (6) smaller spherical drops of equal size? The surface tension, γ, of water at room temperature is 72.0 mJ/m2. PLEASE DO NOT GIVE ME ANSWER FOR FIVE (5) ITS SIX (6)!
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Use standard heat of formations to find the heat for the combustion of 5.0 g of Methane gas CH4 to form carbon dioxide and water vapor
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A series of volumetric flasks are being prepared for the analysis of mercury in the drinking water supply using the method of standard addition. To prepare the flasks, 10 mL of drinking water and a varying amount of standard are added to each flask, and the flasks are brought to the 25.00mL mark on the volumetric flask.
The concentration of mercury standard used was 20.0 microgram/mL.
Please use the data tabulated below to provide the concentration of mercury in the drinking water, in units of micrograms/mL.
It is recommended to use Excel or similar software.
| mL Mercury Standard Added | Signal |
|---|---|
| 0.00 | 19.65 |
| 1.00 | 30.35 |
| 2.00 | 40.28 |
| 3.00 | 49.78 |
| 4.00 | 60.44 |
| 5.00 | 70.0 |
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What are 3 interactions that affect solubility, and how they affect solubility?
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you are asked to prepared 1-bromo-2,2,3,3-tetramethlylbuane by exposure to 2,2,3,3-tetramethylbutane to Br2 in the presence of light. How can yield of this monobrominated product be maximized while minimazing the formation of polybrominated product?
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