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What volume (mL) of the solvent HCCl3 should be added to 0.298 kg of the solute acetone to prepare a solution that is 1.12 m (CH3)2CO.
A 3.0 x 10-2 mg sample of a protein is dissolved in water to make 0.25 ml of solution. The osmotic pressure of the solution is 0.56 torr at 25C. What is the molar mass of the protein
What is the concentration ratio of CO2 (usually written as H2CO3) to HCO3- in blood at pH = 7.40. (carbonic acid Ka1 = 4.3 x 10-7)
A packing crate measures 0.40m X 0.40m X 0.25m. You must fill the crate with boxes of cookies that each measure 22.0cm X 12.0cm X 5.0cm. How many boxes of cookies can fit into the crate?
Acid HA has a pKa = 20; acid HB has pKa = 10 Will an acid-base reaction with an equilibrium lying to the right take place if Na+A- is added to HB
The acidic anion reacts with strong bases according to the following net ionic equation HC8H4O4-(aq) + OH- (aq)--->C8H4O4-2(aq) + H2O(l) If a 0.902g sample of KHC8H4O4 is dissolved n water and titrated to the equivalence point, with 26.45 mL of Na..
suppose you wanted to dissolve 106 g of Na2CO3 in enough H2O to make 6.00L of solution what is the molar mass of Na2CO3.
An excited hydrogen atom with an electron in the n=5 state emits light having frequency of (6.9 x 10^14)(s^-1). what is the principle quantum level for the final state in this electronic transition
using the average initial ph of your acetic acid solutions and the average molarity of those solutions calculate a
consider the cell prepared with 2.0 m cd2 and 0.45 m zn2 solutionszns cd2aq --- zn2aq cdsa calculate the standard
A 100.0 mL sample of cold water at 21.3 C was added to a 75.0 mL sample of hot water at 55.1 C. Calculate the temperature of the warm water mixture.
A food chemist determines that an increase in temperature from 50 to 60 degrees Celcius increases the initial rate of this reaction by a factor of 2.12 (all other initial conditions were kept constant). What is the activation barrier for this este..
CO(g)+Cl2----COCl2(g) Kc=255 at 1000 K If the reaction mixture contains a CO concentration of 0.1500 M and a Cl2 concentration of 0.175 M at 1000K. What are the concetnrations of each substance when equilibrium is reached
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