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A polypeptide is completely hydrolyzed, then reacted with PITC, followed by amino acid chromatography. What information is obtained
Determine what mass of hydrogen is required to form 624g of methanol by the reaction CO+2H2->CH3OH.
an Erienmeyer flask is closed by a stopper connected to a glass tube. the glass tube is sealed by a drop of mercury. if we move the whole appareatus in the diagram from a room with a temp. of of 26 degrees celcius to an outdoor yard with a temp of..
What pressure will the sample have if the volume changes to 268 mL while the temperature is increased to 815 K?
The masses of the unknown and the solvent (water) were determinded, and the unknown completely dissolved in the water. Just before the jacketed test tube containing the unknown solution was placed in the ice-salt water bath
What is the mass percent of NaCl in a solution obtained by mixing 50g of this solution with 215g of H2O?
at room temperature more of the collisions have sufficient energy to produce a reaction. the piece of zinc needs to be bigger at 4 deg c.
Calculate the pH of a buffer solution obtained by mixing 400.0 mL of 0.200 M acetic acid solution and 100.0 mL of a 0.300 M sodium hydroxide solution.(The pKa of Acitic Acid, CH3OOH is 4.74)
Which of the following is/are an atom, an isotope and an ion?
These sections had about 1000 people. There were 10 of these sections in the picture. The other 10 sections had people standing further apart. These sections contained about 500 people each. How many people would you estimate were at the event?
The minimum energy required to break an oxygen-oxygen bond in ozone (O3) is 387 kJ/mole. What is the longest wavelength of light
Determine the molality and molarity of a solution made by dissolving 445 g of NaBr in 2600 ml of water ?
The oil level in the arm connected to flask 2 is 14.17 cm higher than in the arm connected to flask 1. Flask 1 is also connected to an open-end mercury manometer. The mercury level in the arm open to the atmosphere is 18.48 cm higher than the leve..
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