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1. A heliox deep-sea diving mixture contains 2.0 g of oxygen to every 98.0 g of helium. What is the partial pressure of oxygen when this mixture is delivered at a total pressure of 9.0 atm? Express your answer using two significant figures.
2. Lithium reacts with nitrogen gas according to the reaction:
6Li(s)+N2 (g)→2Li3 N(s)
What mass of lithium (in g) is required to react completely with 58.1 mL of N2 gas at STP?
3. A frost-free refrigerator uses 630 kWh of electrical energy per year.
A. Express this amount of energy in J B. Express this amount of energy in kJ C. Express this amount of energy in Cal (Express your answer using three significant figures)
4. The air in an inflated balloon (defined as the system) is warmed over a toaster and absorbs 130 J of heat. As it expands, it does 75 kJ of work. What is the change in internal energy for the system? Express your answer using two significant figures.
An imperial cruiser fires its lasers at the rebel frigate 12X10^30 photons of 505nm wavelength slam into the frigate. The frigate was mostly constructed from high quality materials such as duranium a highly heat
1. for the uncatalyzed decomposition of h2o2aq to form h2ol and o2g the activation energy ea and the change in energy?e
halothane c2hf3brcl is a commonly used gaseous anesthesia. one suggested dosage is 3.0 halothane by volume. what is the
For a silver-silver chloride electrode, the following potentials are observed- E° = 0.222 V E(saturated KCl) = 0.197 V Predict the value of E for a calomel electrode saturated with KCl, given that E° for the calomel electrode is 0.268 V
Calculate the mass of iodine that will react completely with 40.0 g of aluminum (Al) to form aluminum iodid (AH3)
Problem- Consider an isolated N-C bond in an organic compound. Based on the electronegativities of the two elements, which of the following best describes the net charge on the carbon atom
An enzyme is complementary to the transition state - not to the substrate.- What happens to the energy of catalysis (DGcat) when an enzyme is truly complementary to its substrate?
use the values for delta G to calculate Kp for the above reaction at 500 degrees celcius.
a 5.00 gram sample of potassium chlorate/potassium chloride mixture was heated in a test tube. A total of 1.00 L of oxygen gas was collected over water at 25 degrees c and 741 torr. determine the percentage of potassium chlorate in the mixture.
the titration of 40.0ml of 0.200M HONH2 (Kb=1.1 x 10-3) by 0.100 M HNO2. Calculate the pH of the resulting solution after the following volumes of HNO3 have been added
silver iodide in grams will dissolve in a solution that is a 2.0 x 10^-4 M silver nitrate when the system reaches equilibrium
how long will it take for the concentration of A to decrease from 1.0 M to 0.25 M? If [Bo] = 1.5 M, what will be the concentration once [A] = 0.25 M?
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