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A gaseous mixture of O2 and N2 contains 37.8% nitrogen by mass. what is the partial pressure of oxygen in the mixture if the total pressure is 325 mmHg
A 2.00-g sample of a large biomolecule was dissolved in 19.0 g of carbon tetrachloride. The boiling point of this solution was determined to be 77.85°C. Calculate the molar mass of the biomolecule.
How long will it take 10.0 mL of nitrogen gas to effuse through a porous barrier if it has been observed that 89.1 minutes are required for 10.0 mL of Cl2 gas to effuse through the same barrier
a second reaction has a standard Gibbs free energy of -55 kJ/mol. What is the ratio of their equilibrium constants at 300 K?
If more than one precipitate is expected, list the numbers in increasing order and separate them with commas. For example, 3,4,5 is ok but 5,4,3 is not. pH = 7.00: pH = 9.00: What is the pH to the nearest 0.1 pH unit at which Cd(OH)2 begins to pre..
What was the concentration, in mol/L and mg/L, of Cu^2+ and Zn^2+ in the original solution? If the solution was prepared by dissolution of 0.654 g of brass in 250.00 mL solution, what the percentage of copper and zinc in the original sample of bra..
Empirical and Molecular Formula of Adrenaline, Adrenaline contains 59% C, 7.1% H, 26.2% O and 7.7% N and has a molar mass of about 180 g/mol.
how mamy moles of 1 chloroprppane (C3H7Cl) are produced if 352.grams of propane C3H8 react according to the equation
Which of the following ions is least likely to form colored compounds? A) Mn2+ B) Cr5+ C) Sc3+ D) Fe3+ E) Co2+
What makes a red solution, like cherry Kool-Aid appear red to your eye? What colors of light are absorbed and what colors are transmitted?
Calculate the volume of a sample of carbon monoxide at -60.6°C and 801 torr if it occupies 29.4 L at 372 K and 189 torr.
What feed rate of the 30.0 wt% HBr solution would be required to produce 1050 kg/hr of product. What is the feed ratio of liters of 12.0 wt% HBr solution to liters of 30.0 wt% HBr solution.
What is the pH of a buffer solution that is 0.15 M chloroacetic acid and 0.10 M sodium chloroacetate? Ka = 1.3x10^-3.
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