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Additioonal Feat! Dexter and Mandark team up in order toprevent the asteroids from destroying Earth. They start thisplanet saving feat by weighing a gelatin capsule (0.117g) Next they add pieces of aluminum/zinc alloy to the capsuleand weigh the capsule and alloy (0.200 g). They weigh out an emptybeaker (112.600 g) and begin the experiement. After the reaction,they determine the mass of the beaker (with the displaced water) tobe 202.437 g. The temperature of the water was 22 Celsius and thebarometric pressure was 735.8 mm Hg.How many moles of hydrogen gas are there? How many moles of hydrogen per gram of the sample?
Calculate the applied pressure necessary to inflate the alveoli with the surfactant, in units of Torr. By what factor has the addition of the surfactant changed the inhalation pressure
What wavelength of light would be absorbed in raising an electron from the second level to the third level.
What is the pH of the solution if [OH-] of an ammonia solution is 1.0 X 10-2M?
A 91 gram solution of silver nitrate contains 8 grams of AgNO3. What is the percent by mass of silver nitrate in this solution.
f seawater contains 3.5 mass % of dissolved salts, how many kilograms of salts are present in 2.2 mi^3 of seawater? (1mi = 1609m; density of seawater = 1.025g/cm^3).
Given that the energy of combustion (?E) for lauric is -37.1 kJ/g, calculate the heat capacity of the bomb calorimeter. Make sure you enter kJ/C for your unit behind the number.
How many mL of 2.56M solution of KCl are required to prepare 500.0 mL of 1.33 L of a 0.175M KCl solution
argon gas expands from 3.5 mpa and 100degc to 500 kpa in an adiabatic expansion valve. for environment conditions of
At a particular temperature the equilibrium constant for the reaction: H2(g) + F2(g) ? 2HF(g) is K = 36.0. A reaction mixture in a 10.00-L flask contains 0.42 moles each of hydrogen and fluorine gases plus 0.15 moles of HF.
calculate the average power output per pulse of a laser that produces 3.0 j in a 1.0-ps pulse. if the laser operates at
What about formation of a monobrominated alkane -- from an alkene. What sort of addition reaction (see the list of possible reagents in section 4.6 (12.6) does give a monoborminated alkane, when reacting with an alkene.
The venom of biting ants contains formic acid, HCOOH (Ka=1.80*10^-4 at 25 C). What is the pH of a 0.0065 M solution of formic acid?
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