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A 3.0 x 10-2 mg sample of a protein is dissolved in water to make 0.25 ml of solution. The osmotic pressure of the solution is 0.56 torr at 25C. What is the molar mass of the protein
What concentration of Benzoyl peroxide (k_d = 1.45 * 10^(-6) L/mol-s, 60 deg C) would be needed to polymerize a 1.00 M solution of styrene to a molecular weight of 2500
At 25 0C the density of a 50 % (by mass) ethanol/water solution is 0.914 g/cc. Given that the partial molar volume of water in the solution is 17.4 cc/mol.
Then if you inserted the unknown piece of the metal into the solution of iron (III) chloride a deposit formed on the bottom of the well in the well plate. Where does the unknown metal fit into your activity series?
why doen't the mass number decrease? (because there is one less neutron). But the atomic number increases due. What happens to the electrons?
Which of the following species would you expect to be diamagnetic and which paramagnetic? (a) K+; (b) Cr3+; (c) Zn2+; (d) Cd; (e) Co3+; (f) Sn2+; (g) Br.
A Cu/Cu2+ concentration cell has a voltage of 0.24 V at 25M . The concentration of Cu^2+ in one of the half-cells is 1.5×10-3 . What is the concentration of Cu2+ in the other half-cell?
The solubility of calcium chromate is 1.56 ×10-3 g/100 mL of solution. What is the Ksp for CaCrO4?
A radiation detector exposed to sunlight records the energy falling on a given area each unit time. If such a detector has a reading of .430 cal cm^-2 min^-1, how many photons of sunlight are striking each cm^2 in one minute? Assume the average wa..
The activation energy for a given reaction is 87 kJ/mol. What is the ratio of the rate constants for this reaction when the temperature is decreased from 37 °C to 15 °C
Gastric juice is made up of substances secreted from parietal cells, chief cells, and mucous-secreting cells. The cells secrete HCl, proteolytic enzyme zymogens, mucin, and intrinsic factor
The density of water decreases from 1.000g/mL at 3.98°C to 0.9170g/mL as ice at 0°C. By what volume (in mL) would a 2.632 liter flexible plastic bottle increase.
How many milliliters of a 0.300 M lead(II) nitrate solution are needed to react with 50.00 mL of a 0.500 M potassium chromate solution?
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