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Chlorination of ethane yields in addition to ethyl chloride, a mixture of two isomeric dichlorides. What are the structures of these two dichlorides?
Compare the structure of the thiosulphate ion vs. sulphite ion. How would you determine the degree of purity of the sample?
What is the proton concentration in 25mL of a 0.50M solution of LiOH at 25degrees-C?
Calculate the distribution coefficient of caffeine between chloroform and water at room temperature.
The constant-pressure molar heat capacity of benzene is 136.1 J K-1 mol-1 in its liquid range and 81.67 J K-1 mol-1 as a gas.
Consider the process of accelerating a car from 0 to 60 miles per hour in 10 seconds versus 30 seconds. Do both use the same amount of gasoline?
Suppose that all 175L of liquid nitrogen in the tank accidentally vaporized in a lab that measured 10.00mx10.00mx2.50m. What maximum fraction of the air in the room could be displaced by the gaseous
What makes this an oxidation-reduction reaction? Write the half-reactions showing the oxidation and reduction reactions. Identify which is the oxidation reaction and which is the reduction reaction.
Suppose that 10.0 mol C2H6(g) is confined to 4.860 dm3 at 27°C. Predict the pressure exerted by the ethane from (a) the perfect gas and (b) the van der Waals equations of state. Calculate t
What is the importance of calcium in living organisms? and what organisms has it?
A Carnot cycle uses 1.00 mol of a monatomic perfect gas as the working substance from an initial state of 10.0 atm and 600 K. It expands isothermally to a pressure of 1.00 atm (Step 1), and then adi
It is found that the boiling point of a binary solution of A and B with xA = 0.6589 is 88°C. At this temperature the vapour pressures of pure A and B are 127.6 kPa and 50.60 kPa, respectively. (
(a) Write the propagation steps leading to the formation of dichloromethane (CH2Cl2) from chloromethane.
A certain nitrogen-oxygen compound contains 36.84% N by mass and the remainder is oxygen. What is the empirical formula of the compound?
Phosgene, C12C = O, has a smaller dipole moment then formaldehyde, H2C = O, even though it contains electronegative chlorine atoms in place of hydrogen. Explain
Formaldehyde, H2C = O, is known to all biologists because of its usefulness as a tissue preservative. When pure, formaldehyde trimerizes to give trioxane, C3H6O3, which, surprisingly enough, has no
Elemental sulfur occurs as octatomic molecules, S8. What mass of fluorine gas, F2, is needed for complete reaction with 38.5 g sulfur to form sulfur hexafluoride?
The enthalpy of vaporization of chloroform (CHCl3) is 29.4 kJ mol-1 at its normal boiling point of 334.88 K. Calculate (a) the entropy of vaporization of chloroform at this temperature and (b) the
Oleum or fuming sulfuric acid available commercially in concentrations ranging from 20 to 99.9% sulfur trioxide. What is the percent by mass of sulfur trioxide (SO3) if oleum is expressed as 3H2SO4 .
Compound A (C6H14) gives three different monochlorides on photochemical chlorination. One of these monochlorides is inert to E2 elimination. The other two monochlorides yield the same alkene B (C6H
Predict the product, if any, of reaction between propanoyl chloride and the following reagents:
What conditions must be present for (a) translational equilibrium and (b) rotational equilibrium of a rigid body? If these conditions for equilibrium are satisfied, is the rigid body necessarily in st
Silver iodide, Agl, is less soluble in aqueous ammonia than either AgBr or AgCl. What two factors could contribute to this result? Explain.
Find the vertices of the image of ΔABC under the translation T-2,5. To what complex number does this correspond?
Explain the dissolution of silver chloride in aqueous ammonia and its reprecipitation in terms of ionic equilibria and solubility product.