Start Discovering Solved Questions and Your Course Assignments
TextBooks Included
Active Tutors
Asked Questions
Answered Questions
Explain the unit cell for cubic zinc sulfide, cesium chloride, and sodium oxide (ant fluorite structure) Determine the numbers of atoms of each type are in each unit cell?
Determine the densities of the solid forms of W, Pt and Ar given that the length of their unit cell edges are 3.91 A, 3.165 A and 5.3 A respectively. Hints : solid Pt is very malleable, Ar
The dipole moment μ of HCl is found to be 1.0 D, representing a charge separation δ of about 0.17 of an electron charge; the excess positive charge at the H nucleus, the excess electro
Explain what volume of fuel should you bring? Assume each of the following: the fuel has an average formula of C7H16, 15% of the heat which is generated generated from the combustion goes to heat th
Suppose that you are planning a backpacking trip and will need to boil 36 L of water for your group. When backpacking in the wilderness, hikers often boil water to sterilize it for drinking.
Determine the numbers of joules are needed to change the temperature of 60.0g of water from the 23.3 C to 38.8 C?
Describe the endothermic and exothermic reactions in terms of the sign of ΔH. Discuss how much heat was lost if a 625-ml sample of water was cooled from 50.0 C to 10.0C.
Determine the percentage of CO in the exhaust gases? ( where the air is 21% O2. regard H2O as a gas) Even in a well-tuned engine, the combustion of C8H18(l) forms about 1mol of CO(g) per mo
Determine the volume of oxygen formed by the electrolysis of 67.0mL of water at the 23.°C and 1.0 atm, using the ideal gas approximation.
Determine the moles of H2O2 present in a sample if the 0.05L of0.25 M KMnO4 solution are needed to react with the sample(use equation from 4F)
Describe the concentration of [I2] in a 50.0 mL solution that has been prepared by the mixing 1 g of KI with 0.1 gram of iodine? Value of K = 825 K= [I3-] /([I2]*[I-])
If 1×10-3 of Cytosine is submitted to the combustion analysis, determine the numbers of moles of CO2 would be produced and explain how many moles of H2O would be produced?
Write down a net ionic equation for the overall reaction that occurs when aqueous solutions of potassium hydroxide and hydro sulfuric acid are combined.
7-Pyruvic acid, HC3H3O3, is involved in cell metabolism. It can be assayed for (that is, the amount of it determined) by using a yeast enzyme. If a sample containing pyretic acid gives 20.7 mL of c
If 51.1 g of potassium format reacts in a2.50-L vessel, which was initially evacuated, what pressure of hydrogen will be attained when the temperature is finally cooled to25°C?
What has happened in the ensuing time? After a solution of RuCl3 . 5H2O has stood for about ayear, addition of AgNO3 (aq) precipitates 3 mol of AgCl per mole of complex.
The Keq for the conversion of axial ethylcyclohexane to its equatorial conformation is 23 at 25 degrees centigrade. Determine the Gibbs free energy in kcal/mol. Determine the percentage of axial an
By contrast, iodine-125which is used to test for thyroid functioning has a rate constantdecay k=0.011 day-1 Americium-241 is used in smoke detectors.
Sketch the synthesis of mistily oxide from this starting material. What inexpensive starting material do you think is used to prepare mesityl oxide commercially?
Calculate the enthalpy change if 3.8 mol of calcium carbonate is produced? Calcium hydroxide, which reacts with carbon dioxide to form calcium carbonate, was used by the ancient Romans as mortar in
The total pressure in the flask after partial decomposition was 359torr. Describe the mole fraction of each gas in the flask. A 2.42g sample of PCL5 is placed into an evacuated 2.00Lflask
Explain what error is introduced into the determination of an Rf value if the top is left off the developing chamber? Discuss what problem will ensue if the level of the liquid is higher that the
What do you expect to see when the TLC plate has been allowed to remain in the developing chamber too long in the carrying out an analysis of a mixture, so that the solvent front has reached the top
Identify which of the following are the oxidation reduction reaction and find out the oxidizing agent, reducing the agent, substance being oxidized, and the substance being reduced.