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consider the titration of a 26.0 mL sample of .175M CH3NH2 with .155M HBr. Determine each of the following.
1) the initial pH
2) the volume of added acid required to reach the equivalence point
3) the pH at 6mL of added acid
4) the pH at one-half of the equivalence point
5) the pH at the equivalence point
6) the pH after adding 6.0 mL of acid beyond the equivalence point
Calculate the number of molecules inside the cell, which is 3.6um long and 1.2 um in diameter.
The acid solution gives no precipitate when treated with 0.1 M AgNO3. Identify the components of the solid. EXPLAIN.
Explain why the atomic mass of an atom is a decimal number and how that value was determined before being placed on the periodic table.
The infrared spectrum of phenacetin shows absorption bands at the following positions. Match each absorption band with the structural characteristic indicated by that absorption band.
A buffer solution is made by dissolving 2.5g benzoic acid and 2.7 sodium benzoate in 100mL water. 15 mL of 0.125M NaOH is added to the solution
Describe the effect of this on [CH3COOH] and [CH3COO-] (their concentrations). Account for your answer in terms of number of moles of protons transferred. Also, has the capacity of the buffer been exceeded? Explain.
The vessel and contents are returned to 130 degree celsius and the mixture of product gases (CO2, SO2, and unreacted O2) has a total pressure of 2.4 atm. Determine the partial pressure of each of these gases in the final product mixture
A graduated cylinder contains 25.0 of water. What is the new water level after 34.2 of silver metal with a density of 10.5 is submerged in the water.
How much heat do you need to raise the temperature of 150 g of gasoline from 30oC to 15oC?
Calculate the molarity of a solution of acetic acid made by dissolving 19.00 of glacial acetic acid at 25 in enough water to make 230.0 of solution.
What is the enthalpy of vaporization of acetone (CH3COCH3) at its normal boiling point of 56.2?C? The entropy of vaporization of acetone is 88.3 J/K·mol,Answer in units of kJ/mol
how many atoms of hydrogen are contained in 35 molecules are butric acid?
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