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Chemistry Problem
A sample of gas has an initial volume of 3.5 L at a pressure of 970 torr and a temperature of 25*C. If the sample is heated to a temperature of 40*C and expands to a volume of 6.8 L, what is the final pressure in torr?
a metal has a threshold frequency of 7.5x1014 hz. determine the wavelength m of the electron emitted from the metal
Assume that a solid has a constant of Cp,m=25 J/K-mol from 50K to 298K and that the DeBye approximation is valid from 0K to 50K. Estimate the standard molar entropy Sm for the solid at 298K.
a certain monomer used in the production of polymers has one nitrogen atom and the mass composition 67.90 c 5.70 h and
What mass of oxygen (in grams) reacts when 13.2 g of methanol (CH3OH) are combusted in oxygen to produce carbon dioxide and water
If 5.50 of the unknown compound contained 0.183 of and 0.367 of , how many moles of oxygen, , were in the sample.
For a mass of 0.010 g Mg and 5.0 mL of 1.00 M HCl, calculate the partial pressure of the resulting H2(g) in a flask with V = 145 mL at 25?C.
Nitrogen and 20% of Oxygen, and that the pressure at sea level is 1.000 atmosphere, calculate the partial pressures of each gas and the total gas pressure in the middle of the stratosphere at 35.00km altitude, where T=240.0 K.
Part A. You are using a Geiger counter to measure the activity of a radioactive substance over the course of several minutes. If the reading of 400. counts has diminished to 100. \rm counts after 93.1minutes , what is the half-life of this substan..
you and another student were each given an unknown compound. both samples contained pale yellow solids. you both used
Calculate the osmostic pressure of a 0.0120 M solution of NaCl in water at 0 degrees Celsius. Remember that NaCl is an electrolyte and assume it dissociates 100% in water.
The energy required to ionize boron is 801 kJ/mol. What minimum frequency of light is required to ionize boron?
How might your description of the flame color for LiCl change if your wire containing the salt slurry was contaminated with CuCl2?
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