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1) In a laboratory experiment, a student found that a 136-mL aqueous solution containing 2.889 g of a compound had an osmotic pressure of 36.4 mm Hg at 298 K. The compound was also found to be nonvolatile and a nonelectrolyte. What is the molar mass of this compound?
________g/mol
2) The nonvolatile, nonelectrolyte DDT, C14H9Cl5 (354.5 g/mol), is soluble in benzene C6H6.
Calculate the osmotic pressure (in atm) generated when 14.5 grams of DDT are dissolved in 279 mL of a benzene solution at 298 K.
_________atm
3) The ionic compound AgNO3 is soluble in water. Calculate the osmotic pressure (in atm) generated when 8.68 grams of silver nitrate are dissolved in 92.6 mL of an aqueous solution at 298 K. The van't Hoff factor for AgNO3 in this solution is 1.62.
How many grams of ethanol (C2H5OH) (MW C2H5OH= 46.07 g/mol) would have to be burned to produce 450 kJ of heat
Question- A flask contains .597 g of acid and a few drops of phenolphthalein indicator dissolved in water. The buret contains .320 M NaOH. 10 ml of base was added to solution and it turned pink.
Find the expression for the reversible pressure-volume work of an isothermal van der Waals gas with a constant number of moles (integrate the expression fully from Vi to Vf) (b) One mole of a gas at 300 K is compressed isothermally and reversibly ..
How many moles of H+ ions are present in 1.9 L of 0.48 M hydrobromic acid.
The rate constant for decay of 45Ca20 is 4.233x10-3/day. What is the half-life of 45Ca20? a) 81.86 days b) 163.7 days c) 327.4 days d) 409.3 days e) none of these
How can I make up 100ml of a solution containing Compound A (solid, purity of 83.7%) at 90 ug/ml and compound B (liquid, density 1.12 and purity of 90.5) at 30 ug/mL for HPLC reference standard.
A plumber's handbook states that you should not connect a copper pipe directly to a steel pipe because electrochemical reactions between the two metals will cause corrosion. What spontaneous redox reaction(s) might cause the corrosion
Preparing a standard solution of copper sulphate - How much cupric sulphate do you need to weigh out to make 25mL (0.025L) of a 0.1M solution?
Calculate the standard cell potential at 25 degrees celsius for the reaction X(s)+2Y+(aq) -> X^2+(aq)+2Y(s) where delta H = -733 kJ and delta S = -279 J/K
3-ethyl-5,5,6,6-tetramethylhexane. Draw the molecule that fits this description and then name it correctly
Calculate the number of collisions required to slow a neutron from an energy of 2.85 MeV to a thermal energy of 0.025 eV, using a moderator with an average logarithmic energy decrement of .955.
How many resonance peaks should be observed in the hydrogen - decoupled C 13 - NMR spectrum of each of the following compounds?
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