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Suppose you found that the elution volume of the hemoglobin (molecular mass 64,000 daltons) was 7.5mL on your column and that the elution volume of a myoglobin molecule (molecular mass 17,000 daltons) waas 11.4mL. Calculate the approximate molecular mass of an unknown protein which had an elution volume of 9.0mL on the column.
Osmium has a density of 22.6 g/cm3. What volume would be occupied by a 21.8 g sample of osmium?
The Solubility of calcium arsenate, Ca3(AsO4)2 is 3.63 milligrams per 100mL. What would you expect the solubility product (Ksp) to be
Nitrogen dioxide decomposes according to the reaction 2NO2(g) 2NO(g) + O2(g) where Kp = 4.48 × 10-13 at 25°C. What is the value for Kc?
if CO2 gas is collected over water at 25 degrees C and 775torr, what is the partial pressure of the CO2? The vapor pressure of water at 25degrees C is 23.8torr.
How much heat is given off when 11.0 grams of manganese is converted to Mn2O3(s) at standard state conditions? Hf of Mn2O3(s) is -962.3 kJ/mol.
calculations of the sulfuric acid molarity if your average result from the titration of three 0.350 g samples is 15.72 mL. Please explain your answer in detail (words and calculations).
A 41 kg person drinks 250. g of milk, which has a "caloric" value of approximately 3.0 kJ/g. If only 17% of the energy in milk is converted to mechanical work, how high (in meters) can the person climb based on this energy intake?
A helium balloon at a high altitude has 2.1 × 104 L of helium at 0.40 atm and -13°C. If the balloon descends to an altitude in which the atmospheric pressure is 1.00 atm and the temperature is 20°C.
Assuming that the 3s- and 3p-orbitals will form molecular orbitals similar to those formed when 2s- and 2p-orbitals interact, according to molecular orbital theory
If you start with 1.000 g of sulfur (S8) and obtain 4.963 g of pure compound. What is the empirical formula of this compound?
An element crystallizes in a face-centered cubic lattice. The edge of the unit cell is 392 pm, and the density of the crystal is 21.45 g/cm3. Calculate the atomic weight of the element (in g/mol)
If 8.6 L of NO is combined with excess O2 at STP, what is the volume in liters of the NO2 produced?
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