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An extended source emits 2.00 W cm-2 sr-1 nm-1 at 300 nm. Calculate the spectral radiant power impingent on a 1.00 cm2 receptor that5 is 2.00 M away in W nm-1 and photons s-1 nm-1 if a 1.00 mm diam
A 36 gram sample of copper at 99.8 C is dropped into a beaker containing 207 grams of water at 18.5 C. what is the final temperature when thermal equilibrium is reached.
A nitric acid solution containing 71.0% HN)3 (by mass) has a density of 1.42 g/mL. How many moles of HNO3 are present in 1.00L of this solution?
An ordinary 3.0 V flashlight bulb draws roughly 0.25 A of current and converts about 1.0% of the electrical power into light (λ = 550 nm). If the flashlight beam initially has a cross-sectio
You need 4.5L of nitric acid solution with ph 6. you have unlimited amounts of nitric acid solution with a hydronuim ion concentration of 0.01M. Describe how you would form the required solution from
If 277 g SO2 escaped into the atmosphere and all the escaped SO2 were converted to H2SO4. How many grams of H2SO4 would be produced in the atmosphere?
170 mL of an HCl solution with pH of 2.30 is added to 200 mL of an HNO3 solution. The resulting pH is 1.40. What was the pH of the original HNO3 solution?
A KNO3 solution is made using 96.4g of KNO3 and diluting to a total solution volume of 1.20L. what is the molarity of the solution.
A balloon is filled to a volume of 7.00X10^2 mL at a temperature of 20.0 degrees C. The balloon is then cooled at constant pressure to a temperature of 1.00X 10^2 K. What is the final volume of the
What is the C2O42- concentration in a solution that is 0.10 M in oxalic acid and 1.0 M in HCl? (Consider that the oxalic acid concentration at equilibrium for this common ion problem is 0.10 M.)
Compute the atomic packing factor for the diamond cubic crystal structure (shown in the figure below). Assume that bonding atoms touch one another, that the angle between adjacent bonds is 109.5o,
What is the limiting reactant when 4.5 moles of aluminum react with 6.7 moles of oxygen gas? Show, or explain, all of your work along with the final answer.
what is the minimum number of KiloJoules needed to change 40 grams of water 100 C to stem at the same temperature and pressure?
A sample of hydrogen gas (H2) is in a 2.98 L container at 708 torr and 19 oC. Express the pressure of hydrogen in atm after the volume has changed to 1.41 L and the temperature is raised to 210 oC.
In a certain experiment, 28.0 mL of 0.250 M HNO3 and 53.0 mL of 0.320 M KOH are mixed. Calculate the amount of water formed in the resulting reaction. What is the concentration of H+ or OH- ions in
What does the absorption spectrum of the ligand, ethylenediamine, look like in the visible region which you used in this experiment.
Cortisone is a steroid used to treat joint inflammation. Each cortisone molecule contains 21 atoms of carbon plus additional atoms. The mass percent in cortisone is 69.98%/ What is the molecular we
What mass of oxygen gas, measured at 238 K and 3.51 atm, is required in order to release 6670 kJ of heat to the surroundings?
A sample of nitrogen gas is collected over water at a temperature of 23.0 degrees Celcius. What is the pressure of the nitrogen gas if atmospheric pressure is 785 mm Hg?
If the aluminum block is initially at 25 degrees C, what is the final temperature of the block after the evaporation of the alcohol? Assume that the heat required for the vaporization of the alcohol
1-buytyl bisulfate may serve as teh precursor to an ether and an alkene, as well as the desired 1-bromobutane. Provide the structures expected for the ether and the alkene that might be produced fr
A student mixed 75.0 mL of water containing .75 mol HCL with 75.0 mL of water containing .75 mol of NaOH at 25C in a foam cup calorimeter. The temperature of the resulting solution increased to 35C.
Suppose a solution contains aqueous Hg2(NO3)2 . Write complete ionic equation to show the reaction of aqueous Hg2(NO3)2 with aqueous sodium chloride to form solid Hg2Cl2 and aqueous sodium nitrate. Ex
The heat released by this reaction is sufficient to ignite paper. How much heat is released when 27.5 g of calcium oxide reacts?
A patient needs to take 875 mg of ibuprofen twice daily. The pills in the bottle are each 250. rm mg. How many pills does the patient need to take each time she wants the 875 mg dosage? Assume that