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Aluminum will react with bromine (Br2) to form AlBr3. What mass of AlBr3 will be produced if 1.00 gram of Al completely reacts with excess Br2?
a sample of 1.00 l of gas at ntp conditions contains 20 oxygen and 80 nitrogen. calculate the number of moles of each
A compound has a molar mass of 110.1g/mol and a composition of 65.45%C, 5.45% H, and 29.09% O. Calculate the molecular formula of this compound.
A specific steroid has max = 291 nm and molar absorptivity = 11,500. What is the concentration of the compound in a solution whose absorbance at 291 nm is A = 0.050 with a sample pathlength of 1.00 cm
when 50.0 gram of metal at 75.0 C is added to 100 grams of water at 15.0 C the temperature of the water rises to 18.3 C. Assume that no heat is lost to the surroundings. What is the specific heat of this metal
What is the pH of a solution resulting from the titration of 50 mL of 0.050 M formic acid solution, HCOOH, with 25 mL of 0.050 M NaOH solution? Calculate your answer to two decimal places.
Calculate the change in Gm for ice at -10C, with density 917kg/m^3 when the pressure is increased from 1.0 bar to 2.0 bar. Self test 3.12
A student mixes 175.0 grams of water at 62.31oC in a coffee-cup calorimeter with 175.0 grams of water at 25.84oC. The final temperature of the mixture is 41.71oC.
what is the calculated value of partial pressure of o2 in acid mine water of ph 2 in which fe2+=fe3+.
An oligomeric protein has a molecular weight of 168000. A 420 mg sample was treated with an excess of 1-fluoro-2,4-dinitrobenzene (Sanger\'s reagent) until the reaction was complete
Na2SO3, to the calorimeter above that contains 20.00g of water at 23.15 degrees C, what will the final temp of the calorimeter be when the reaction gose to completion
The total amount protein decreases and the specific activity increases. B. The total amount of protein and the specific activity both decrease.
A 0.7818g sample containing phosphate (PO4 3-) was dissolved. The phosphate was precipitated as MgNH4PO4 by addition of aqueous Mg2+ followed by addition of aqueous ammonia. After filtration and washing,
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