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A large man sits on a four-legged chair with his feet off the floor. The combined mass of the man and chair is 95.0 kg. what pressure does each leg exert on the floor
x rays with a wavelength of .12nm undergo first-order diffraction from a crystal at 80 degree angle of incidence
what is the speed of an electron with a de Broglie wavelength of .29nm, What is the speed of a proton with a de Broglie wavelength of .29nm
what is the speed of a 200g baseball with a de Broglie wavelength of .18nm, what is the de Broglie wavelength of a 200g baseball with a speed of 20 m/s
A very small circular metal ring of radius r=0.5cm and resistance x=5ohms is that the center of a large concentric circular metal ring of raduis R=50cm, What is the magnitude and direction of the av
a hydrogen atom is in the n=15 state. In the Bohr model, how many electron wavelengths fit around this orbit
The sun radiates energy at the rate 3.8*10^26W. The source of this energy is fusion, a nuclear reaction in which mass is transformed into energy. Estimate the lifetime of the sun
There are 5 pairs of plates: A,B, and D are charged plastic plates and C is an electrically neutral copper plate. A is attracted to B, C to A, C to D, B to D, How can you tell if they attract or do
A cylindrical wire is carrying a current that is non-uniform in both space and time, Find an equation that describes magnetic field inside the wire due to the current as a function of r from the cent
You are standing at x=8.0km Lightning bolt 1 at x=0km and lightning bolt 2 at x=13.0 km. If your assistant didn't see the flashes at the same time, what is the time difference between the two flashes
What fraction of the power radiated by the sun is intercepted by the planet Neptune? The radius of Mercury is 2.48 107 m
but is lined with a calcite surface. Determine the concentrations of Ca2+, HCO3-, CO32-, and H2CO3. Examine the charge balance and comment on what else your neighbor may be doing to his pond.
What molarity of aqueous calcium chloride solution can be expected to show the same conductivity as 0.0050 M aluminum sulfate at 12,500 units. What does the 12,500 units mean in this question?
What is the metal ion in a metal nitrate solution M(NO3)3(aq) if 90.52g of metal was recovered from a 4.00 hr electrolysis at a constant current of 35.0A
in the formation of bromohydrin is there two water molecules being added to the reaction? One water molecule attaches to the carbon and the second one pulls off and H from the OH2 already attached t
At what temperature would the pressure be 1.50 x 10-2 atm? c. At what temperature would the pressure be at 25.0 atm?
A container is filled with an ideal gas to a pressure of 40.0 atm at 0 degrees C. a. What will be the pressure in the container if it is heated to 45 degrees C?
Determine K for the reaction, H2C2O4(aq) + 2 OH-(aq) <=> C2O42-(aq) + 2 H2O(l) given that, for H2C2O4(aq), Ka1 = 6.5 x 10-2 and Ka2 = 6.1 x 10-5. Don't forget that Kw = 1 x 10-14.
In the titration of a weak base (0.100 M piperazine, 40 mL) with a strong acid (0.100 M HCl). Calculate the pH values between 0 mL Va and 100 mL in 10 mL steps. The two Ka values of piperazine are 4
What would the bonding geometry at each nitrogen atom be for the following: NOCl, NO2Cl, and NO3Cl the options are trigonal planar, linear, tetrahedral, and bent
what product would you expect to obtain from addition of Cl2 to 1,2-dimethylcyclohexene? Show the stereochemistry of the product.
The final temperature is 27.06 C. Assume the volumes are additive, the specific heat of the solution is 4.180 J g/C, and that the density of the solution is 1.00 g mL -1. Calculate the enthalpy chan
Sugar (C6H12o6) combusts and releases 246.8 kJ what is the complete chemical reaction? What is the enthalpy of the reaction
consider the bohr model of the one ecectron atom Be+3, calculate the radius,in nm,of ground state orbital
6 M H2SO4 is carelessly substituted for 6 M HCL. Will more or fewer drops of 6 M H2SO4 be required for the litmus to change color