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Pyrazine (C4H4N2) and pyridine (C5H5N) have structures similar to benzene. Both compounds have structures with 6 atoms in a ring. Illustrate the Lewis structures for pyrazine and pyridine showing a
Provide a short justification for your answer and show all calculations? Joe Cool phase titrated a 25 mL solution containing an unknown concentration of weak base with 0.10 M HCl strong acid and for
Calculate the energy required to raise the temperature of 250.0g of zinc from the 24.0 degrees C to 150 degrees C. where the specific heat of Zn=0.402J/g C.
What mass of O2 will dissolve in a 1.0x10 to the third power Liter fish tank at the 20*C if the Henery's law constant for O2 in water at 20*C is 1.3x10 to the negative third power mol/L.atm?
These two compounds form gaseous mixtures and ideal liquid. The vapor pressure of pure liquid A at 300 K is 76.6 kPa and that of pure liquid B is 52.0 kPa. Calculate the equilibrium Composition of a
The solution in the calorimeter weighs82.4 g and 0.22 mol of A was consumed in the reaction. An exothermic reaction A --> B was carried out in dilute aqueous solution in a calorimeter.
Considering the trans and cis isomers of 1-bromo-2-methylcyclohexane. Provide the product(s) when each of the isomers reacts with the sodium methoxide at an elevated temperature and which reacts fa
How can determine the mass percent of hydrogen in water? The mass% of H is [x] %. Make sure to report your answer to the correct amount of signature figures and use the periodic table from your lab
Discuss is it easier to remove an electron from a gaseous silver atom or from the surface of solid silver (φ=7.59 x 10^(-19) J; IE =731 kJ/mol))?
A sample is prepared by mixing the 5.00 ml of 0.200 M Fe (N0)3 Solution with the 3.00ml of 2.00*10^-3M KSCN and the mixture is made up to 20.0ml with distilled water. Calculate the concentration of
Write down the Lewis structure for nitric acid (HNO3) where the three the ionizable H atom is bonded to one of the O atoms and O atoms are bonded to the central N atom. Assign the formal char
A portion of urine which is having 10.00mL titrated with the 15.04mL of Hg (NO3)2 solution. In the standardization of the Hg(NO3)2 solution 35.67mL were consumed to titrate a solution conta
To purify the municipal water supplies and to treat the swimming pool waters chlorine is widely used. Suppose that the volume of a particular sample of Cl2 gas is 8.52 Lat 886 torr and
In the reaction of mercury (II) sulphate with the cerium (III)sulphate in the presence of sulfuric acid and nitric acid, along with the water, mercury (I) cyanide, carbon dioxide and the cerium(IV)s
Discuss how much of the correct reagent should you add? A 1L Buffer solution initially contains the 0.25mol of NH4Cl and 0.25 mol of NH3. You would like to adjust the pH from the 9.25 to 8.
What is the new volume of the balloon if 4.0 g of helium gas is added to a 1.00 L balloon which having 1.00g of helium gas, assume there is no change in the temperature or pressure
Suppose your little sister likes the warm milk very much. While you were waiting for your milk to cool to room temperature, she had a sip in your absence. Calculate the changed in your glass of mil
Order of reacton, Calculate the rate constant of a first-order reaction which has 7.70 minutes for the reactant concentration to drop to half of its initial value?
Determine the pH of the solution made by adding .50 mol of HOBr and .30 Mol of KOBr to 1. L of water and when the value of Ka for HOBr is 2.0 x 10-9.
When the experimental procedure has you wash your thermometer and dry it before you calculate the temperature of the HCL solution and after you calculate the temperature of NaOH solution. Why?
Explain what kind of solvent is most useful for promoting a neutral nucleophile and why? In Sn2 reactions you have the option of using a great number of nucleophiles.
When 4.00 grams of ascertain vinegar sample was titrated with .200 M NaOH, 25.56 mL of the NaOH solution were required to reach equivalence point.
Identify the metal and calculate the pH of the solution. Suppose 10.00 g of an alkaline earth metal reacts with 10.0 L of water to form 6.10 L of hydrogen gas at 1.00 atm and 25°C.
Determine the triple point temperature and pressure when the vapor pressure of an unknown solid is approximately given by in(P/Torr) = 20.654 - 1877 (K/T), and the vapor pressure of the liquid phas
Discuss what will be the pressure inside the heated can, assuming the container remains intact during the incineration? A sealed can with an internal pressure of 721 Torr at 25 degree C is thrown i