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An airplane is pressurized to 650 , which is the atmospheric pressure at a ski resort at 1.30×104 altitude. If the partial pressure of oxygen drops below 100 , passengers become drowsy. If this happens, oxygen masks are released. What is the total cabin pressure at which oxygen masks are dropped?
Calculate the freezing point and boiling point of the solution. Kf benzene = 5.12 C/m Kb = 2.53 C/m
An enzyme-catalyzed reaction produces a product that has a maximum absorbance at 412 nm. The extinction coefficient is 4000 M-1 cm-1. A 10/1 dilution of the enzyme is made and 20 mL of the dilution are put into a cuvette with 80 mL of water and 1...
Explain for which of the following species resonance is an important property: HONO, HONO2, N3-, NO2-, NO2.
Why acetone has significantly high refractive index when a mixture of acetone and water is distilled
If you have a sodium salt of stearic acid and neutralize it with acid, the solubility changes. Explain those relative solubility differences of these two chemical species in a solvent like hexane.
Consider the reaction CO(g)+ 3H2(g) CH4(g)+ H2O(g) with KC=4.1 x 105 at 773 K. The following amounts of substances are added to a 7.25 L reaction vessel: 0.103 moles CO, 0.205 moles hydrogen gas, 2.10 moles CH4 and 3.15 moles water vapor.
The production of iron and carbon dioxide from Iron (3) oxide and carbon monoxide is an exothermic reaction? how many kj of heat are produced when 3.40 mol Fe2O3 reacts with excess of CO.
Consider the combustion reaction between 26.0 mL of liquid methanol (density=0.850g/mL) and 13.0 L of oxygen gas measured at STP. The products of the reaction are CO2(g) and H2O(g),
hydrogen gas can be produced by reacting aluminum with sulfuric acid. how many moles of sulfuric acid are needed to
The decomposition of hydrogen peroxide is first order in H2O2. 2H2O2 -----> 2H2O + O2 The rate constant for this reaction at 20 C is 1.8 * 10^-5 s^-1
If the hydrated cobalt(II) ion complex from Part C were refrigerated, what would be your prediction for the color of the solution
DNA Coiling and Topoisomerase, draw a circular DNA molecule that contains 3 negative supercoils. In this DNA molecule, make L = 250 and T = 253. Don't draw the details here i.e., all 250 of the strand passages around each other.
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