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When 0.204 moles of (NH4)3PO4 in enough water to make 1.00 L of solution, what is the total concentration of all ions present in solution?
if 100L of hydrogen gas at 20 atm and 259 k reacts with excess nitrogen,how many liters of NH3 at 500 k and 1 atm will form
Alpha helices are a type of secondary structure in proteins. What is the length of a 25-kDa single-stranded -helical protein segment. Assume a mean residue mass of 110 Da.
Compute the mass of Au(gold) that occupies 5.0 X 10^-3 cm^3. If the density of gold (Au) is given=19.3 g/cm^3.
determine the structures of Compounds A, B, C, D, and E. Show calculations. Support all of your structure determinations.
Starting with acetylene and any other necessary reagents, propose a synthesis for 1,2-dibromobutane
A cylinder of propane gas at 25oC has a volume of 32.0 liters. The pressure of the gas in the cylinder is 9 atm. To what temperature (in oC) must the gas be heated to increase the pressure by 2 atm? Assume ideal behavior
Each was extracted with three 5-mL aliquots of CCl4 containing an excess of 8-hydroxyquinoline. The extracts were diluted to 25 mL and their fluorescence was measured. What is the concentration of the zinc in the unknown solution?
A sealed-end water manometer attached to an air duct reads 1598 cm. An open-end water manometer attached to the same duct reads 556.2 cm.
Calculate the freezing point of a solution of 23.4 grams of benzoic acid (C6H5CO2H) dissolved in 613 grams
The molar heat of fusion of naphthalene (C10H8) is 4610cal/mol. What is the heat of fusion in kJ/g
Describe the experiment(s) (as necessary), observations (as necessary), and results (as necessary) which would allow you to distinguish
Calculate the vapor pressure of water above a solution prepared by adding 23.5 g of lactose (C12H22O11)to 200.0g of water at 338K . (Vapor-pressure of water at 338K 187.5 torr.)
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