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Twenty-five pounds of gas consisting of 40% CO, and 30% H2 are placed in a cylinder 200 ft^3 in volume. What is the a) average molecular weight of the gas? b) density of the gas in lb/ft^3?
N2O4 is introduced into an empty 2.14L container, what are the partial pressures of NO2 and N2O4 after equilibrium has been achieved at 45 degree celsius? Pn2o4, Pno2=?
Calculate the zero-point energy of a harmonic oscillator consisting of a rigid CO molecule adsorbed to a metal surface by a bond of force
A sample of urea contains 1.009 g N, 0.145 g H, 0.432 g C, and 0.576 g O. What is the empirical formula of urea?
10.9g of ice at 0.00 degrees C is mixed with 50.0g of water at 32.0 degrees C. What is the final temperature of the mixture? (heat of fusion=333J/g; specific heats: ice=2.09J/gK; water=4.184J/gK
A thief plans to steal a gold sphere with a radius of 28.8 cm from a museum. If the gold has a density of 19.3 {rm g/cm}^3, what is the mass of the sphere? [The volume of a sphere is V = (4/3)pi r^3.]
What is the molarity of your NaOH solution? 2) You are given an impure sample of oxalic acid dihydrate (MW=126.068 g/mole) and asked to determine the percent of oxalic acid dihydrate present in the sample.
Consider an ordinary 8 fluid oz. glass of water (H2O). Suppose, hypothetically, that all of the water molecules in the glass could be marked.
buffer solution from a solution of 0.200-M aniline, C6H5NH2, a weak base, and a solution of 0.100-M hydrochloric acid. take the pKa of aniline to be 9.13.
What is the velocity of a first-order reaction when the reactant concentration is 6 x 10-2 M and the rate constant is 8 x 103 sec-1?
If the methane contained in 4.00 of a saturated solution at 25 was extracted and placed under STP conditions, what volume would it occupy?
Assuming that the specific heat of water is 4.18 J/(g ? °C), and that the heat absorption by the calorimeter is negligible, estimate the enthalpy of combustion per mole of anthracene
a 50.0 g sample of water is cooled from 30 degrees Celsius to 15 degrees Celsius losing 3140 J of heat What is the change in enthalpy.
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