Can an impure sample of oleic acid be purified by recrystallization? Justify your answer for full credit.
In: Chemistry
Gaseous indium dihydride is formed from the elements at elevated temperature: In(g)+H2(g)⇌InH2(g),Kp=1.48 at 973 K The partial pressures measured in a reaction vessel are PInPH2PInH2===0.0550atm0.0290atm0.0780atm Determine the equilibrium partial pressure of In. Determine the equilibrium partial pressure of H2. Determine the equilibrium partial pressure of InH2.
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how could proton nmr be used to quickly differentiate between a mono versus a di-nitration product
In: Chemistry
Candy chemist was asked to determine the concentration (m/m) of new alcoholic beverage from the molarity, which was determined to be 3.205 M and the density, which was found to be .984 g/mL/ What is the mass percent of ethanol (MM= 46.068 / mol) in the beverage ?
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Which equation can be used to find the pH of a buffer. Then calculate the pH of a buffer containing 0.20 M CH3COOH and 0.20 M CH3COONa. What is the pH after adding 10.0 mL of 0.10 M HCl to 65.0 mL of the buffer?
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81) You are a engineer in a shipping company and you have identified some corrosion on one of your ocean freighters that is occurring below the water line, around rivets that have some kind of green slime covering them. What’s happening and what can you do to mitigate the problem?
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Please answer in clear words NO guessing!!! Thanks
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Assume you dissolve 0.235 g of the weak acid benzoic acid, C6H5CO2H, in enough water to make 3.00 ✕ 102 mL of solution and then titrate the solution with 0.138 M NaOH.
C6H5CO2H(aq) + OH-(aq) C6H5CO2-(aq) + H2O(ℓ)
What are the concentrations of the following ions at the equivalence point?
Na+, H3O+ ,OH-
C6H5CO2-
M Na+
M H3O+
M OH-
M C6H5CO2-
What is the pH of the solution?
In: Chemistry
Consider the chemical reaction: C(s)+H2O(g)→CO(g)+H2(g)
How many liters of hydrogen gas are formed from the complete reaction of 1.16 mol of C? Assume that the hydrogen gas is collected at a pressure of 1.0 atm and temperature of 319 K. ( ANSWER SHOULD BE IN LITERS )
Express your answer using two significant figures.
CH3OH can be synthesized by the reaction:
CO(g)+2H2(g)→CH3OH(g)
How many liters of H2 gas, measured at 741 mmHg and 88 ∘C, are required to synthesize 0.68 mol of CH3OH?
Express your answer using two significant figures.
How many liters of CO gas, measured under the same conditions, are required?
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How many grams of NH3 form when 24.5 L of H2(g) (measured at
STP) reacts with N2 to form NH3 according to this reaction? The mass of an evacuated 255 mL flask is 143.227 g . The mass of the flask filled with 263 torr of an unknown gas at 35 ∘C is 144.247 g . Calculate the molar mass of the unknown gas. |
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1. For an electron, the number of values the spin quantum number Ms can take on is; Three, four, one, two?
2. what is the threshold energy for the production of an proton-antiproton pair? Emin= MeV
In: Chemistry
Consider the following reaction: 2H2S(g)+SO2(g)⇌3S(s)+2H2O(g) A reaction mixture initially containing 0.500 M H2S and 0.500 M SO2 was found to contain 1.3×10−3 M H2O at a certain temperature. A second reaction mixture at the same temperature initially contains [H2S]= 0.255 M and [SO2]= 0.325 M . Calculate the equilibrium concentration of H2O in the second mixture at this temperature.
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In a titration of 44.86 mL of 0.3356 M ammonia with 0.3356 M aqueous nitric acid, what is the pH of the solution when 44.86 mL of the acid have been added?
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List the following aqueous solutions in order of decreasing freezing point: 0.040 m glycerin (C3H8O3), 0.020 m KBr, 0.030 m phenol (C6H5OH
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1)Hypochlorous acid (HOCl), a weak acid (pKa = 7.6) can be used for disinfecting water. If 1 mg of HOCl is added to pure water to make up 1 L of liquid volume, what is the equilibrium pH?
(b) The pH of the solution in part (a) is to be raised to 7.0 by addition of NaOH, a strong base. What mass (in grams) of NaOH must be added?
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I'm being asked to compute the literature "true" value of the heat of solution of KCll at infinite solution. What do I need/how do I do this?
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Questions are as shown. NO additional information was given.
1. Calculate the f.e.m. for the following reaction at 25oC Li+(aq) (1.8e-4M) + 2Cl-(aq) (6.9e-2M) → Li(s) ( - M) + Cl2(g) ( - M)
Ecell = ? (2 decimals accuracy!)
2. Calculate the f.e.m. for the following reaction at 25oC Au3+(aq) (3.0e-2M) + 2I-(aq) (2.2e-3M) → Au(s) ( - M) + I2(s) ( - M)
Ecell =? (2 decimals accuracy!)
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