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In the absorption spectrum of the hydrogen atom, the electron is promoted from n=2 level to the n=3 level. What energy does this correspond to in joules?
Which of each following pair would you predict to have the higher boiling point and why?
a. Ar or Ne
b. TeO3 or XeO3
c. FeCl3 or PCl3
d. CH3OH or CH3SH
Which of the following has a greater viscosity and why?
octane or ethanol
a certain first-order reaction has a rate constant of 7.20times10-3 at 45 . how many minutes does it take for the
A mixture of NO, CO2, and O2 gases has a total pressure of 2.5000 x 10^3 torr. If the partial pressure of NO is 800.0 torr and CO2 is 600.0 torr, what is the partial pressure of O2
U^o for the reaction A(s)+2B(g) ->2C(s)+D(g) was measured at temperature T in a constant volume calorimeter. ?H^o for the reaction is approximately what
When 6.40 g of CH3OH was mixed with 10.2 g of O2 and ignited, 7.50 g of CO2 was obtained. What was the percentage yield of CO2?
Place drying tube filled with CaCl2 on condenser. Heat to reflux at 190 C for 25 minutes then cool. Add 0.5mL tolulene and petroleum ether 0.5-0.75 mL until slight cloudiness remains. Reheat until clear and cool in ice bath. Collect product and wa..
Describe how you can use titration to determine the molar mass of an unknown acid, by giving a specific example and showing a sample calculation.
A pure amount of this substance was then heated in a closed containe until the liquid-gas interface disappeared. The pressure and temperature at this point was 15.2 MPa and 315 K. Calculate the Van der Waals coefficients and the Virial coefficient..
what is the dosage of quinine when a 170lb adult takes a 400.0 mgtablet? Express in ug quinine per kg of body weight.
The decay constant for strontium-90 = 0.0247y-1. if 10.0 g decay for exactly 60 years then determine how many grams of strontium-90 remain.
When the atmospheric pressure is 1050 , what is the absolute pressure (in ) in the tank if the height of the mercury in the open tube is 25.0 higher than the mercury in the tube connected to the tank
the elemental mass percent composition of ascorbic acid (vitamin C) is 40.92% C, 4.58% H, and 54.50% O. Determine the empirical formula
What is the osmotic pressure, in atm, of a solution formed by dissolving 17.4 g of PbCl4 in 0.336 L of water at 62.2 oC? (R = 0.0821 L-atm/mol-K; 0 oC = 273 K)
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