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A student at a temperature of 0 degrees C adds the 25.0 g of NaCl crystals to a mixture of 25 mL of ice water in a coffee cup calorimeter.
Explain why H2O has an H - O - H bond angle of 104.5o while CH4 has a H - C- H bond angle of 109.5o. Write down the Lewis structures for the following none of which obey the octet ru
Compute the sulfuric acid molecule, H2SO4. The sulfur atom is the central atom in this molecule, with the oxygen atoms attached to it. The Hydrogen atoms are then attached to two of the oxygen atoms
If the reaction has a rate constant k at 25 degree Celsius, explain how will the rate constant be modified at 60 degree Celsius. Consider an elementary reaction with activation energy of 1000
Explain the objective of having linear x term in form. Why do we require to have more than one x, is not one x2 term sufficient to explain something as quadtraic.
Find out the pressure if the volume of the container is maintained the constant and the temperature is raised to 379C when a sample of nitrogen gas in a 1.57-L container exerts a pressure of 1
The equilibrium constant of the reaction of Cl2(g) with PCl3(g) at a particular temperature to form the PCl5(g) is 50. What are the equilibrium concentrations of all species if the initial concentr
A sample which is having a 3.00 g of SO2(g) originally in a 5.00L vessel at 21 degree Celsius is transferred to a 10.0L vessel at 26 degree Celsius and a sample which is having the 2.35 g N2(g) orig
3 H2(g) +N2(g) ↔ 2NH3(g), The reaction has the following equilibrium constants at the following temperatures. Calculate at which temperature are products favored?
Define what is happening to the concentrations of reactants on the molecular level. At a particular temperature, iodine vapor, I2, is added to a bulb which is having the H2(g).
Determine the numbers of liters of chlorine gas, calculated at STP, would be formed by the electrolysis of molten sodium chloride by using a current of 3.50A for 46 Minutes?
Calculate the minimum sulfide ion concentration that will result in the precipitation of one action but not the other. Use sulfide precipitation to separate the copper (II) ions from the manganese
Determine amount invested at every rate if the interest earned after I yr is $760 and amount invested at 9% is equal to sum of amounts invested at 5% and 7%.
The products of the bombardment are cerium-144, rubidium-89, beta particles, and more neutrons. Determine the fission reaction in which the U-235 is bombarded by neutrons.
Moe is lecturing Larry and Curly once again claiming he is twice as smart as Larry and 3 times as smart as Curly. If he is right and sum of their IQs is 165, find IQ of every stooge?
Analysis from charcoal in the cave gave 12.0 disintegrations/min/g of carbon. The remains of an ancient cave were unearthed. Analysis of a tree cut down when the cave was unearthed showed 15.3 disi
Iodine-131 decays by the beta emission and has a half-life of 8.1 days, it is used to treat thyroid cancer. Write down a balanced nuclear reaction for the decay of iodine-131.
Determine the pH at the equivalence point in the titration which is having 50mLof .13M methylamine with a .26M HCl solution. Kb=4.3x10^-4
Octane has a vapor pressure of 13.95 torrat 25 C and a vapor pressure of 144.78 torr at 75 C. Gasoline is a mixture of hydrocarbons, a major component of which is octane.
Determine the frequency in Megahertz of the incoming photon if you hit the surface of copper with a photon of energy and find out that the ejected electron has a wavelength of 1.8 NM.
Analyze the effect of the structure of the alkyl halide on SN1 and SN2 reactivity and also compare the simple secondary, primary and the tertiary alkyl halides.
What is the Molarity of the solution NaOCl when the quantity of iodine that liberated is such that28.02 mL of 0.0250 M Na2S2O3 solution must be added to cause the disappearance of the dark blue color
Solve system by triangularizing augmented matrix and utilizing back-substitution. Simplify by clearing fractions or decimals before beginning.
Identify the balanced equations for the oxidation-reduction reactions: The reduction of ClO- by I- in the acidic solution:
Find out the atomic wt of this metal when the density of an unknown metal is 8.94 g/cm^3 and its atomic radius is 0.126 nm. It has a face centered cubic lattice.