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A sample of protein weighs 0.800 g and is dissolved in 50.0 mL of water. If the osmotic pressure of the solution is 10.5mmHg at 25 degrees C, what is the molecular weight of the protein?
Using scanning tunneling microscopy, scientists at IBM wrote the initials of their company with 35 individual xenon atoms.
Given the following substances and their melting points, hydrogen, -259 degrees Celsius, ethyl alcohol, -114 degrees Celsius, water, 0 degrees Celsius, sucrose, 186 degrees Celsius, and calcium chloride, 772 degrees Celsius
A sample of gas has a volume of 1.55 L at 35 °C and 1.05 atm. What is the pressure (in torr) if the volume changes to 1.38 L and temperature to -28 °C.
A sample of gas has an initial volume of 2.4 L at a pressure of 855 mm Hg and a temperature of 298 K. If the gas is heated to a temperature of 387 K and expanded to a volume
What is the molarity of your HCl solution if it take 35.25 mL to reach the second equivalence point of a titration against 0.2225 grams of standard sodium carbonate?
A 10.0 mL sample of sulfuric acid from an automobile battery requires 35.08 mL of 2.12 M sodium hydroxide solution for complete neutralization.
Fluorine-18, which has a half-life of 110 min, is used in PET scans. If 123 mg of fluorine-18 is shipped at 8:00 a.m., how many milligrams of the radioisotope are still active if the sample arrives at the radiology laboratory at 1:30 p.m.?
Draw the structure of the product likely to be obtained from the reaction between acetoacetic ester, bromobenzen & 2 molor equivalents
A solution is prepared by dissolving 1.00 g of Compound B in enough water to create 250.0mL of solution. What is the molarity of Compound B in this solution?
The Delta H for this reaction is 54.8 kJ. How much energy would be absorbed if 24.7 g of NH_4Cl reacts?
identify any incorrect formulas. explain your answer.a. mg2so43b. rb3asc.
At its boiling point of 100C, 724 kJ of heat is required to vaporize 321 g of water. What is the molar enthalpy of vaporization of water
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