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Another solution is prepared by dissolving 0.7500g of an unknown non-electrolite in 15g of Carbon tetra-chloride (CCl4, Kf=-30 C/molal). The freezing point of this solution is 6.50 C lower than the freezing point of pure carbon tetrachloride. Explain what is the molar mass of the unknown?
What are the mechanisms for the following 2 reactions: 1. 2-iodohexane reacting with NaOCH3/HOCH3 2. 2-iodohexane reacting with HOCH2CH3/heat
When 0.100g of graphite is burned completely in a bomb calorimeter(heat capacity =3.344kJ/?C), containing 3000 g of water, a temperature rise of 0.21?C is observed.
how many grams of water can be cooled from 30 degrees c to 18 degrees c by the evaporation of 49g of water? the heat of
After allowing the solution to sit for 30 minutes the student determines that the bromide concentration was [Br-]= 0.0012 M. What is the Pb2+ concentration?
What mass of Na2S2O3 is required to prepare 1.00 L of a solution that will dissolve 1.00 g of AgBr by the formation of Ag(S2O3)2^3-? Show work.
At 700 K the equilibrium constant for the reaction is Kp = 0.76. CCl4(g)-> C(s) + 2 Cl2(g) A flask is charged with 2.00 atm of CCl4, which then reaches equilibrium at 700 K. (a) What fraction of the CCl4 is converted into C and Cl2?
If the internal ph of muscle cell is 6.80, what is the HPO4^2-/H2PO4^- ratio in this cell. the values are pk1=2.12, pk2=7.21, and pk3=12.32 for phosphoric acid, h3po4.
The normal melting points and boiling points of xenon are -112 deg. Celsius and -107 deg. Celsius, respectively. The Xe triple point is at -121 deg. Celsius and 282 torr, and its critical point is at 16.6 deg. C and 57.6 atm.
The enthalpy of formation of compound X is -612 kJ/mol, and the sole product of its combustion has a enthalpy of formation of -671 kJ/mol. What is the enthalpy of combustion of compound X?
Predict the following Bronsted acid-base reaction at 25 C: HF+CL- -> HCL + F- (a)Predict whether K will be greater or smaller than one? (b)Does delta S prime and delta H prime make a greater contribution to delta G prime?
What is the percent purity of the calcium hydroxide if the titration requires 21.42 mL of the acid to reach the endpoint
benzoic acid is a monoprotic weak acid with ka 6.30 x 10 to the 5 negative. what is the ph of a solution of benzoic
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