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1. What are some differences in the emission spectra of the different elements?
2. In which discharge tubes are electrons undergoing the largest and smallest energy changes (from what we can tell by only observing gas tubes with the naked eye)?
3.
a. Which discharge tube emits visible light with the highest frequency, as seen with the naked eye?
b. Which discharge tube emits visible light with the longest wavelength, as seen with the naked eye?
4. What are some differences in emission between the incandescent and fluorescent light bulb?
5. Identify the light sources that produce a line spectrum. Identify those that produce a continuous spectrum.
6. Which element in the glowing discharge tubes is most likely to be the element in the flu- orescent lamp? Explain your reasoning.
Sunlight strikes the surface of a lake at an angle of incidence of 30o. At what angle with respect to the normal would a fish see the Sun
the acceleration due to gravity on the moon is about one sixth the gravitational acceleration near the earths surface.
Which compound is the limiting reagent for this reaction. Calculate the change in enthalpy (delta H rxn) per mole of limiting reagent for this reaction.
TLC plate that is then developedi n a 1:1 hexane/ethyl acetate solution the solvent front is measured at 6.5 cm and the distance traveled by caffeine is measured at 2.15 cm. What can be determined about the identity of compound X in light of this ..
1.compare and contrast covalentionic and hydrogen bonds.2. what information can you gather from the periodic table.3.
Given a balanced chemical equation and enthalpy of reaction, relate energy change to amount of reactant or product
An engineer is designing a reactor that will be filled with oxygen under high pressure. The volume of the reactor is 253 L, the maximum temperature inside the reactor will be 250ºC, and the pressure inside the reactor must not exceed 150 atm. The eng..
What is the value of the equilibrium constant for Haber process at 298K if the equilibrium concentration are as follows:
Calculate the equilibrium concentration of Ni2+ during the titration of 50.00 ml of a 0.0250 M NI2+ solution buffered to a constant pH of 6.0 following the addition of
How an acidic fluid will modify the outcome of an enzymatic reaction using these materials pH paper, hydrogen peroxide solution
0431 moles of sucrose (a sugar with a MW of 342 g/mol) are dissolved in 400.0 g of water. The solution density is 1.013 g/mL and you can assume that the density of pure water is 1.00 g/mL. What is the molality of this solution
In a certain industrial process involving a heterogenous catalyst, the volume of the catalyst (in the shape of a sphere) is 10.0cm cubed. If teh sphere were broken down into eight spheres each having a volume of 1.25cm cubed
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