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Calculate the pH of a solution that results from mixing 19.5 mL of 0.145 M HCN(aq) with 22.1 mL of 0.108 M NaCN. The Ka value for HCN is 4.9 x 10-10.
What is the freezing point of a solution of 5.00 g of benzophenone (C13H10O) in 100 mL of benzene (benzene density = .887 b/mL). Pure benzene has a melting point of 5.50 C and the Kf of benzene is 5.12 C/m
How many mL of 5.0 M NaOH can be added before its buffering capacity is exhausted?
Mass Absorbance Recrystallized sample .3040 g .070 concentration of salicyclic acid in the recrystallized aspirin sample solution =.000044 M
When diborane (B2H6) dissociates in either solvents, such as tetrahydrofuran (THF), a complex between borane (BH3) and the ether is formed. (a) In the Lewis sense, what is the function of BH3 as it forms the complex? Explain.
Which satisfy the octet rule and which do not? PS3, SO2, SO3, NO3-1, CO3-2, PCl5
the mechanism involved in the distillation of a mixture containing acetone and ethanol
Calculate the amount of energy released by the freezing of 13.3 g of a liquid substance, given that the substance has a molar mass of 82.9 g/mol and a molar heat of fusion of 4.60 kj/mol.
If the actual yield is 220.0 g and the theoretical yield is 275.6 g then what will be the percent yield of ferrous sulfide.
After obtaining a preliminary melting point range of 124-130 degrees C for an unknown, you identify it as benzamide. Running a mixed melting point determination with benzamide affords a melting point range of 117-125 degrees C
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?
Hydrogen sulfide is found at a concentration of 3 parts per million in air. Using the temperature and pressure conditions that are considered "standard" for air quality work, this concentration means that there are [Blank] milligrams of hydrogen s..
Calculate the standard-state entropy for the following reaction: 1 \rm CH_4(g) + 2 \rm O_2(g) \longrightarrow 1 \rm CO_2(g) + 2 \rm H_2O(l) (If applicable, coefficients of one have been included for clarity.)
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