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A mineral oil has a density of 0.875 g/cm3. suppose you spread 0.85 g of this oil over the surface of water in a large dish with an inner diameter of 21.6 cm. How thick is the oil layer? Express the thickness in centimeters.
Calculate the ph of the solution made by adding 0.50mol of HOBr and 0.30 mol of KOBr to 1.00 L of water. The value of Ka for HOBr is 2.0 x 10^-9.
A hypothetical element consists of two isotopes of masses 86.95 amu and 88.95 amu with abundances of 35.5% and 64.5%, respectively. What is the average atomic mass of this element?
a sample of nitrogen gas is collected over water at a tempature of 23.0 c. what is the pressure of the nitrogen gas if atmospheric pressure is 785 mm hg
Use Coulomb's law to calculate the ionization energy in kJ/mol of an atom composed of a proton and an electron separated by 203.00 pm
The outdoor concentration of radon is 1 pCi/L. Develop a mass balance for this problem and estimate the steady-state radon concentration in the crawl space (in pCi/L).
the balloon reaches an altitude of 100m, where the pressure was 658 mmHg and the temperature was -8c. what was the volume in liters of the ballon at these conditions?
Calculate the percent ionization of hydrazoic acid (HN3) in solutions of each of the following concentrations
how much of each solution do you need to prepare 1 L of buffer containing 20 mM glucose, 30 mM dihydrogen sodium phosphate, and arginine 1 mM? Explain in words how would prepare this solution.
When a 58.4 nm radiation is directed on a sample of Krypton, electrons are ejected with a velocity of 1.59x106 m/s. What is the ionization energy of the Krypton
A change in the primary sequence of a protein will never change how a protein is allosteric regulated. a.) True b.) False Which of the following is NOT a mechanism of enzyme regulation? a.) Feedback inhibition by a product. b.) Addition or removal..
For CH2CBr2, which geometric isomers do you suppose is energetically most stable; containing less repulsion energy: cis or trans
A sample of steam with a mass of 0.550grams and at a temperature of 100 degrees celcius condenses into an insulated container holding 4.30grams of water at 6.0 celcius
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