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The solubility of oxygen in lakes high in the Rocky Mountains is affected by the altitude. If the solubility of O2 from the air is 2.67 × 10-4 M at sea level and 25°C, what is the solubility of O2 at an elevation of 12,000 ft where the atmospheric pressure is 0.657 atm? Assume the temperature is 25°C, and that the mole fraction of O2 in air is 0.209 at both 12,000 ft and at sea level
what is the value of ni for an electron that emits a photon of wavelength 95.04 nm when it returns to grount state in a th H atom
write lewis structures that obey the octet rule for each of the following molecules and ions. in each case the first
The freezing point of benzene is 5.5oC. What is the freezing point depression of a solution of 5.00 g naphthalene (C10H8) in 444 g benzene (Kf of benzene = 4.90oC/m)?
If the same amount of sebacoyl chloride, 1,6-hexanediamine and sodium hydroxide were combined , but the solvent was used to afford a homogenous reaction mixture
Commercial club soda is produced by pressurizing water with 10 atmospheres of CO2. Find the value of KH for CO2 on the net or in the library, and calculate how much CO2 is in a 12 fl.oz. glass of club soda.
How many grams of CaH2 are needed to generate 53.5 L of H2 gas if the pressure of H2 is 1 atm at 194 C.
Compute the molarity of the hydroxide ions (OH- )in a solution that has been made by adding 70.3 grams of barium hydroxide (Ba(OH)2) in H2O(water) and diluting the solution to a final volume of four litres.
must inflate the balloon to what diameter for it to have a density equal to the salt water, and therefore float in the middle of the tank?
If 3.420g of ^226 Ra (t 1/2= 1620 yrs) is separated from its decay products and placed in a sealed 1L vessel, what is the partial pressure (in torr) of helium after 45 days if the vessel is at 0 degrees C? The half life of Rn is = 3.82 days
Calculate the pH of a buffer formed by mixing 85 ml of 0.12 M lactic acid with 95 ml of 0.15 M sodium lactate.
Balance the following redox reaction as it occurs in the basic solution. What are the coefficients for OH^- an ClO^- in the balanced equation? Cr(OH)4^- (aq) _ ClO^- (aq) arrow CrO4^2- (aq) + Cl^- (aq)
Important information about Proteins, A globular protein in aqueous surroundings contains the following amino acid residues; phenylamine, methionine, glutamate, lysine, and alanine.
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