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What are amino-acid tRNA synthetase enzymes and why are they important in the biology of cells? How many different ones do you know exist in any given cell type?
What is the proper name of the intramolecular reactions that occur in amino acids to form Zwitterions?
Calculate the molarity of a solution made by dissolving 0.0715 mol Na2SO4 in enough water to form exactly 550. mL of solution
How many kilograms of sodium fluoride would be needed to treat a 8.00 x 10^7 gal reservoir
Small helium-neon lasers emit 1.51 mJ/s of light at 634 nm. How many photons does such a laser emit in one minute?
What metal ions are involved in electron transport, and what is special about them that enable electrons to be shuttled among the various proteins
Calculate the normal boiling point of a 1.7m aqueous solution of the molecular compund sucrose.
an undergraduate researcher in a biology lab produced a buffer solution by dissolving sodium dihydrogen phosphate (Ka = 6.2 × 10-8) and sodium hydrogen phosphate (Ka = 3.6 × 10-13) together in an aqueous solution. What mole ratio of Na2HPO4/NaH2PO..
Limestone, CaCo3, when subjected to a temperature of 900 degrees Celsius in a kiln, decomposes to calcium oxide and carbon dioxide. How much heat is evolved or absorbed when one gram of limestone decomposes?
A two-component mixture of volatile liquids was separated by gas chromatography using a 25 meter capillary column. The separation was insufficient with this column to see resolution of both fractions
What mass of NaN3(s) must be reacted in order to inflate an air bag to 74.6 L at STP?
suppose the experiment was done with 1.0m H3PO4 as the acid. What would be the stoichiometric ratio, mol H3PO4/mol NaOH at the intersection of ascending and descending portions of the graph?
If a bottle of nail polish remover contains 153 g of acetone, how much heat would be released by its complete combustion?
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