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1. What evidence provided support for Bohr's model of the atom?
2. Why is the ionization of Hydrogen greater than the energy of any frequency in the bright-line spectrum for Hydrogen?
A sample of oxygen gas has a volume of 150 mL when its pressure is 0.947 atm. What will the volume of the gas be at a pressure if 0.987 atm if the temputure remains constant
net ionic equation for the reaction of 0.100 M nitrous acid with Barium hydroxide. Calculate the pH of the acid - I'm lost - can you help with the calculations
What is the theoretical yield and limiting regent if 2.6 g of benzaldehyde is reacted with 0.7 g of acetone to produce dibenzalacetone
where the temperature and pressure are 4oC and 3.0 atm, to the water's surface, where the temperature is 25oC and pressure is 0.95 atm. Calculate the final volume of the bubble if its initial volume was 2.1 mL
what is the freezing point of an cyclohexane solution that boils at 81.27 degrees c? normal freezing point is 6.5 and
Calculate the enthalpy change for the reaction, assuming that the solvation enthalpies of the sugars are negligible. Draw an energy profile for the overall process.
Close the side neck of the flask with a rubber pipette bulb (or vacuum line in case of high mp substances), and then place ice water in the centrifuge tube.
85.0 of is initially at room temperature (22). A chilled steel rod at 2 is placed in the water. If the final temperature of the system is 21.2, what is the mass of the steel bar?
for the reaction X(g) + 3Y(g) equilibrium 3Z(g). Kp=2.08x10^-2 at a temperature of 277 degrees Celsius. Calculate the value of Kc
An unknown element forms a yellow ion, XO . It forms a precipitate with silver ions. If 48.0 mL of a 0.250 mol/L solution of silver ions is added to a solution of the unknown ion, 1.856g of a red-brown precipitate are formed. Determine the iden..
at 25ordmc the solubility product constant ksp for strontium sulfate srso4 is 7.6acute10-7. the solubility product
If 9.0 g of Al metal react with excess HCL according to the balanced equation (2Al(s) + 6HCL(aq)----> 2AlCl3(aq) + 3H2(g)), what volume of hydrogen gas at STP will be produced
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