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An object in the shape square with a circle cut in the center of it spins about it ceter of mass. what is moment of inertia in terms of M and R
A fence 2 feet tall runs parallel to a tall building at a distance of 3 feet from the building. What is the length of the shortest ladder
Write an expression for a harmonic wave that has an amplitude of 18cm, a wavelength of 2.0m, and propagates to the left at 15 m/s
A sinusoidal voltage %u0394v = (75 V) sin (180t) is applied to a series RLC circuit with L = 20 mH, C = 155 %u03BCF, and R = 30 %u03A9. What is the maximum current in the circuit
You keep your coffee in a sealable thermal mug which has thermal conductivity k-0.036 W/m k. how long (in minutes) will it take the coffee to cool down
Three moles of an ideal gas are contained in a 75 L container at a pressure of 1.6 atm. What is the temperature of the gas
Oxygen gas having a volume of 1.00 liter at 40.0 celsius and a pressure of 1.00 atmosphere expands until its volume its 1.50 liters, FInd the number of moles of oxygen
Write the time-independent Schrodinger equations for (a) an electron moving in one direction about a stationary proton and subjected to a Coulombic potential, (b) a free particle, (c) a particle sub
A student places 1.38g of unknown metal at 99.6 degrees Celsius into 60.50 g of water at 22.1 degrees Celsius. The entire system reaches a uniform temperature at 31.6 degrees Celsius. Calculate the
A 13.53 mL sample of 0.05000 M AgNO3 is added to an ion exchange column; the solution that emerges from the other side is found to be acidic. Titration of the solution that comes out of the column r
Which of the following solids is a covalent network? 1. H2O(s) 2. CaCO3(s) 3. Ni(s) 4. SiO2(s)
Calculate change in heat when 18.80 g of water vapor steam at 100 C condenses to liquid water and then cools to 20.5. the molar heat capacity of water is 75.3 J/ (mol x C). Delta Hvap= 40.67 KJ/mol.
2.00 g of salicylic acid (molar mass = 138.1 g/mol) reacts with an excess amount of acetic anhydride. A) calculate the theoretical yield of acetylsalicylic acid (molar mass = 180.2 g/mol) for this s
Diamond and graphite are two crystalline forms of carbon. In which form are the bonds between the C atoms arranged at tetrahedral angles to each other? 1. diamond 2. Neither of these 3. graphite
Some wastewater has a BOD5 of 150 mg/L. The reaction rate is 0.23/d. What is the ultimate carbonaceous BOD
An insecticide has the following composition: 47.5% C, 2.54% H, and 50.0% Cl. Determine the empirical formula.
350.0 mL of 2.50 M HCL are added to 400.0mL of 5.00 M HCL. Assuming that the volumes are additive, what is the final concentration
How many moles of sulfate ions are there in a 0.20 L solution of 0.080 molar aluminum sulfate
75.0 g of PCl5(g) is introduced into an evacuated 3.00 L vessel and allowed to reache equilibruim at 250 degrees celcius. PCl5(g) <---> PCl3(g) + Cl2(g) Kp=1.80 for this reation, what is the t
Elemental sulfur reacts with oxygen and water to produce Sulfuric acid in the presence of a catalyst. What minimum mass of sulfur is needed to prepare 175g of sulfuric acid
At a particular temperature the first-order gas-phase reaction2N2O5? 2N2O4 +O2 has a half-life for the disappearance of dinitrogenpentoxide of 3240s. If 1.00 atm of N2O5 isintroduced into an evacuat
0.1M HCl is added into a mixture of 25mL of water and 25mL of Ca(OH)2. For the end point to be reached 1.5mL of 0.1M HCl is added into the mixture
Read carefully, 0.1M HCl is added into a mixture of 25mL of water and 25mL of Ca(OH)2. For the end point to be reached 1.3mL of 0.1M HCl is added into the mixture. How would I calculate the molarity
The thermal decomposition of acetaldehyde, CH3CHO->CH4+ CO, is a second- order reaction. the following data were obtained at 518 degrees C.
Estimate the heat flow when a double pane of glass is used with a 4.0 mm air gap between the panes? Each individual glass sheet is 4.0 mm thick