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The Franck-Hertz experiment demonstrated which of the following?
Atoms colliding with electrons absorb energy in discrete amounts.
Atomic spectra are characteristic of the elements.
The absorption of light causes a change in energy ΔE = hν
A and C
How much heat in kilojoules is required to warm 10.0 g of ice, initially at -10.0^\circ C, to steam at 110^\circ C. The heat capacity of ice is 2.09 {\rm J}/{\rm g} ^\circ {\rm C} and that of steam is 1.84
how many moles of methane occupy a volume of 2.00 L at 50.0 degress C and 0.500 atm? (R=0.0821atm x L/mol x K)
bathophenanthroline is a compound that forms a red complex with ironii. the molar absorptivity for the complex is 22350
Problem- If 50.0mL of 0.0050 M aluminum nitrate are added to 50.0mL of 0.2 M sodium hydroxide, at equilibrium condition what will be the concentration of all three species (Al3+, OH-, Al(OH)4-) Explain the your answer in detail
The final temperature of the calorimeter is 29.5 deg C. What is the specific heat capacity of the unknown metal. The specific heat capacity of water is 4.184J g^-1 degC^-1. Write answer in decimal form to two decimal places.
Calculate the de Broglie wavelength associated with a muon traveling at a velocity of 3.45 104 cm/s.
A 21.2 g sample of a metal was heated to 61.98 degrees C. When the metal was placed in a constant-pressure calorimeter containing 30.0 g of water, the temperature of the water rose from 24.69 degrees C to 29.27 degrees C. Calculate the specific he..
small helium-neon lasers emit 3.50 mjs of light at 634 nm. how many photons does such a laser emit in one
A complex ion, [ML6]2+, is orange in solution. If the same metal forms a complex with another ligand, Q, that creates a stronger crystal field. What color(s) could [MQ6]2+ be
A drug is metabolized in the body by a first order rate process. If the half life for this drug in the body is two days. If 100 mg is taken define how much remains after 5 hours
A 1.000 L steel tank is fitted with a safety valve that opens if the internal pressure exceeds 1.00 x 103 torr. It is filled with helium at 19.5 °C and 0.924 atm and then placed in boiling water at exactly 100°C. What is the pressure in atm in the..
Deduce the structure of the molecule that is composed of carbon, hydrogen and oxygen with a MS molecular mass peak value of 100 and molecular peak values of m/z = 29, 43, 57, 71, 100
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