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The carbon-14 decay rate of a sample acquired from a young tree is .260 disintegration per second per gram of sample and the other wood sample organized from an object.
Determine the exponential model for size of culture as the function of time t in hours and use model to forecast how many bacteria there will be after two days.
Determine the melting point of ice under a pressure of 50bar. Suppose that the liquid water is1.00 g cm-3 and the density of ice under these conditions is approximately 0.92 g cm-3.
Determine the wavelength of a photon which is created by an electron falling from the n=3 level to the n=1 level in an excited hydrogen atom.
Next week you took $17 per guest and averaged 230 guests per night. Determine linear demand equation showing number of guests q per night as function of cover charge p.
Explain how do you tell if the equilibrium concentration of H ions is small compared to the initial concentration of acid? Is there a certain number that is considered small?
Determine the frequency and the wavelength of the light emitted when an electron changes from n=4 to n=3 in the H atom. Explain in what region of the spectrum is this radiation found?
Discuss how much heat is released when the 15.0 L of CO at 85degrees Celsius and 112 kPa reacts with the 18.5 L of H2 at 75 degrees C and 744 torr?
Calculate the order in which the following compounds will elute from a chromatography column: acetophenone, 1,3-dichlorobenzene,4-aminobenzoic acid and benzoic acid.
Average weight of the sport utility vehicle (SUV) can be estimated by W=5t2-60t+4700. How long will it take the $1000 investment to be worth $1500 if it is compound monthly at the annual rate 6%.
At 27degrees Celsius the rate at which crickets chirp is 2.0x10^2 per min but only the 39 chirps per min at 5 degrees Celsius. Determine the activation energy for the chirping process.
The solution is filtered and a 25.00 mL sample needs 17.50 mL of 0.0150 M HCl to neutralize it. Determine the value for Ksp of Ca(OH)2 from this data.
If final exam score counts for two-thirds of grade and other test count for one-third, then what range of scores on final exam would give her the final average over 70? All tests have maximum of 100
Cesium metal is used extensively in the television cameras and in the photocells because it has very low ionization energy and is readily ionized by the light.
Determine the de Broglie wavelength of one of these alpha particles. Alpha particles emitted from the radioactive radium have energy of 4.8 MeV.
At 26.0 degree C exactly the 11.2 mL of water are added to a hot iron skillet. At 100degree C all of the water is converted into the steam. The molar heat capacity of iron is 25.19 J/(mol. degree C)
A solution of a dye was calculated by the spectrophotometers, and the following calibration data were collected:
The emission spectrum below for a one-electron species in the gas phase shows all the lines, before they merge together, resulting from transitions to the first excited state from higher energy stat
There is point on edge of this pipe which is both 5 in. from ground and 10 in. from wall. Determine two possibilities for radius of pipe.
A gaseous carbon and hydrogen containing compound is decomposed and found to contain the 14.37% H and 85.63% C by mass. The mass of 258 mL of the gas, calculated at STP, was found to be 0.646 g. How
A solid metal which is having 25g with a specific heat of .090j/gK is heated to 65 deg C. and dropped into the water whose temperature is 22 deg C. After allowing the temperature to stabilize, desc
The top of the 140-foot vertical tower is to be anchored by cables which make the angle of 61° with ground. How long should the cables be?
A block of copper which is having the mass 500 g and initially at 293 K is in the thermal contact with an electric heater with resistance 1.0 kΩ and negligible mass.
A solution which is having 1.00 L of 0.450 M oxalic acid solution is condensed by the evaporation to 665.0 ml. Calculate the new molarity of this solution?
Determine the melting point of ice under a pressure of 50 bar. Suppose that the density of ice under these conditions is approximately 0.92 g cm-3 and that which is having the liquid water 1.00