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A breathing mixture used by deep-sea divers contains helium, oxygen and carbon dioxide. What is the partial pressure of O2 at 101.3 kPa total pressure if the partial pressure of He = 84.0 kPa and t
The normal boiling point of acetone is 56.00°C, and its Kb is 1.71°C/m. Calculate the molality of the solution from this data.
A specific brand gourmet chocolate candy contains 7.00g of dietary fat in each 22.7 piece. How many kilograms of dietary fat are in a box containing 2.00 lb of candy?
What volumes of H2(g) and O2(g) at STP are produced from the electrolysis of water by a current of 3.00 A in 10.0 minutes?
Consider the electronic structure of the element bismuth. The first ionization energy of bismuth is Ei1 = +703 kJ / mol. What is the longest possible wavelength of light that could ionize an
A temperature of 100C condenses into an insulated container holding 4.50 g of water at 6.0C. Assuming that no heat is lost to the surroundings, what will be the final temperature of the mixture?
Which of these solutions has the lowest freezing point?
A compound is found to contain 39.12 % carbon, 8.772 % hydrogen, and 52.11 % oxygen by weight. What is the empirical formula?
A mixture of 60.0% ZnS and 40.0% CuS is heated in the air until the sulfides are completely converted to oxides as shown by the following equations .
What is the chemical reaction that takes place when you add Calcium Bromide with Hg (elemental mercury) at 700 degree F?
72 ml of a 1.70 M solution is diluted to a volume of 288 ml.a 144 ml portion of that solution is diluted using 149 ml of water. what is the final concentration
What is the difference between cholesterol and lanosterol?
Calculate the molar mass of a sample if a simgle molecule weighs 8.90 x 10^-23 grams.
A mixture of CH4 and H2O is passed over a nickel catalyst at 1000. K. The emerging gas is collected in a 5.00 L flask and is found to contain 8.14 g of CO, 2.58 g of H2, 45.4 g of CH4, and 42.3 g o
A chemist wants to prepare a solution with a freezing point of 22.0°C and has 100.00 g of glycerol on hand. What mass of water should the chemist mix with the glycerol?
Draw the skeletal structure of the organic species containing the carbonyl functionality needed to form 2-phenyl-1-ethanol upon metal-catalyzed hydrogenation.
Write a plausible chemical equation to interpret at the atomic level, what you observed in the reaction of Lysol toilet bowl cleaner with 0.1 M AgNO3?
Explain the order of elution you observed while performing the gas chromatography for this experiment. What property of the product molecules seems to be the most important in determining the relat
An unknown carbohydrate compound has the empirical formula CH2O. A solution consisting of 0.515 g of the carbohydrate dissolved in 1.717 g of acetic acid freezes at 8.8°C. What is the molar mass
What volume of acetylene at 25 degree C and 1.01 atm is generated by the complete reaction of 2.49 g of calcium carbide? What volume would this quantity of acetylene occupy at STP?
How would you distinguish between methyl benzoate and phenylacetic acid using 1H NMR spectroscopy?
A sealed balloon is filled with 0.50 L of helium at 23°C and 1.00 atm. The balloon rises to a point in the atmosphere where the pressure is 240. torr and the temperature is -33°C. What is th
Why is an acetyl group added to aniline (making acetanilide) and then removed to regenerate the amine group in sulfanilamide?
Draw the chair form of rings A-C of cholesterol, and assign the hydrogens at the B/C ring-junction as equatorial or axial.