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calculate the molarity of of the following solutions 6.57g of methanol ( CH3 OH) in 1.50 x 10^2 mL solution
A gas mixture containing methane and n-butane enters an absorber tower at 20°C and a flowrate of 125 m 3 /h. The partial pressures at these conditions are 105 kPa for methane and 580 kPa for n-b
Suppose you are given 150 mg of an unknown mixture that contains three compounds, and you are told to separate the compounds using column chromatography, using alumina as a stationary phase. How wou
What is the partial pressure of each of the components. b. If the temperature is raised to 45°C, will the partial pressures change? If so, what will they be
The column is run with a solvent system based on hexanes, but which becomes more polar with the addition of more and more dichloromethane over time. Predict the elution order.
The complete combustion of propane, C3H8(g), is represented by the equation: C3H8(g) + 5 O2(g) ? 3 CO2(g) + 4 H2O(l) ?H° = -2220 kJ How much heat is evolved in the complete combustion of 12.5 L
Urea (NH2)2CO is prepared by reacting ammonia with carbon dioxide. The byproduct is water. 637.2g of ammonia are reacted with 787.3 g of carbon dioxide. Which of the two reactant is a limiting react
Ferrocene eluted from the column first and acetylferrocene second, but ferrocene ended up as the higher of the two spots during TLC analysis. Explain.
The density of magnesium oxide is 3.58 g /cm3. Given that the radius of the O2- ion is about 140 pm in most oxides, calculate the radius of Mg2+, in pm. Your solution should include a sketch one fac
The half life for the radioactive decay (first order process) of 32P is 14.2 days. How many days would be required for a sample of radiopharmaceutical containing 32P to decrease to 20% of its initia
Given that the radius of the O2- ion is about 140 pm in most oxides, calculate the radius of Mg2+, in pm. Your solution should include a sketch one face of the unit cell of MgO to show how the edge
The binding energy of electrons to copper metal is 389.3 kJ/mol. What is the longest wavelength of light that will eject electrons from copper metal? Enter units.
What is the wavelength in meters of the photon emitted when this highly excited hydrogen atom of hydrogen makes its transition from the n = 9 to the n = 8 state
Microwave ovens heat food by creating microwave electromagnetic radiation that is absorbed by water molecules in the food. Any material that does not have water in it will not absorb the radiation a
Find the amount of heat involved when 300.4 g of propane is burned with an excess of oxygen. C3H8(g) + 3 O2(g) ? 3 CO2(g) + 4 H2O(l) -->?H = -2219 kJ
The atomic weights of sodium, oxygen, and hydrogen are 23, 16, and 1, respectively. To neutralize 4 grams of NaOH dissolved in 1 L of water requires 1 L of: (A) 0.001 normal HCl solution (B) 0.01 no
The Rice-Herzfeld mechanism for the thermal decomposition of acetaldehyde (CH3CO) is the following below (10 points) (1) CH3CHO ---> CH3' + CHO' (k1) (2) CH3' + CH3CHO ---> CH4 + CH2CHO' (k2)
what conditions does the rate equation reduce to second-order kinetics in NO and first kinetics in O2
The student titrated 25.0 mL of the buffer with 0.115 M NaOH. What is the concentration of the weak acid in the buffer? what is the buffer strength i.e, the total HA and A
Using the "unit conversion method", derive an equation to calculate the heat produced from the HCl-NaOH reaction, and write your equation on Sample Calculations A
Why we have a decrease in in the volume of the crude organic product during the extraction with HCl. What causes this decrease
The Keq for imidazole binding to hemoglobin can be determined from the following linear equation: 1/?A100Keq * 1/[lm +1/?A100=(1/?A) a. For the plot of the reciprocal of the change in absorbance ver
Calculate the delta Hrxn for the following equation- 4KNO3(s) - - > 2K2O(s) + 2N2(g) + 5O2(g)
Two drops of 0.20 M imidazole solution were added to a solution containing ferrihemoglobin. The mass of the ferrihemoglobin solution was measured before the addition of the imidazole and the mass of
List infrared peaks which are found for methyl m-nitrobenzoate which would not be found in the infrared spectrum of methyl benzoate. List functional group/bond as well as position.