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We irridate an unknown atomic system, in the gas phase, with monochromatic UV radiation of wavelength 0.605x10^-7m and observe a sharp absorption line. All other absorption lines have higher wavelength. What atom is it? (remember the expression for the energy levels of an atomic system as a function of Z)
Rubidium has two common isotopes, 85Rb and 87Rb. If the abundance of 85Rb is 72.2% and the abundance of 87Rb is 27.8%, what is the average atomic mass of rubidium.
What volume of 3.50M H2S is required to react with excess O2 to produce enough NH3 to fill a cylinder that is 50ft long and has a diameter of 13 ft at a pressure of 450 torr and 20°F
How many mL of 3.00 M HCI should be added to react completely with 16.8g of Na2CO3 according to the following equation? Na2CO3(aq)+HCl(aq)=NACI(aq)+CO2(g)+H2O(l) What mass of CO2 is produced from the reaction
If you have 200.0 mL of a 30.0% aqueous solution of isopropyl alcohol, what volume of water is in the solution?
The iridium is plated out from the solution onto a boron doped diamond electrode at constant potential. The initial mass of the electrode before plating was 7.4938 g
hydrogen chloride gas is shipped in a container under 5.000 mm hg pressure that occupies 20 liters at 30 celcius how many liters of gas would be produced at stp?
How many moles of O2 are required for the complete combustion of 2.2 g of C3H8 to form CO2 and H2O?
The number of resonance structures (not involving d orbitals) required to correctly describe the bonding in the linear ion Nâˆ'3 is:
the sulfur is converted into sulfur dioxide gas.The sulfur dioxide reacts with solid calcium oxide to form solid calcium sulfite
How many liters of ammonia gas can be formed from the reaction of 150 L of hydrogen gas? Assume that there is complete reaction of hydrogen gas with nitrogen gas and that all measurements are made at the same temperature and pressure.
How much heat (in kJ) is released when 15.0 L of CO at 85 degrees C and 112 kPa reacts with 18.5 L of H2 at 75 degrees C and 744 torr?
HNO3 by mass and has a density of 1.047 g/mL. What is the pH?
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