Start Discovering Solved Questions and Your Course Assignments
TextBooks Included
Active Tutors
Asked Questions
Answered Questions
What are the pKa's of the 2 acidic protons of salicylic acid. Suggest a synthesis of methyl salicylate using phenol as a starting material.
the temperature of the solution increases to 26.5 C. Calculate the enthalpy change, Delta H, for this reaction per mole of X. Assume that the specific heat and density of the resulting solution are
suggest another small molecule that like water and ammonia might make a good ligand. remember that ligands are electron pair donors which means that one atom must have a lone pair of electrons on it
The enzyme triose phosphate isomerase catalyzes the isomerization of dihydroxyacetone phosphate. What is the product of this reaction
In glycogen degradation, what enzyme is responsible for releasing a glucose molecule attached to the main glucose chain at a branch point
the following changes in a DNA molecule may have no effect on the protein for which the DNA codes
A mixture is made by combining 1.39 lb of salt and 5.07 lb of water. What is the percentage of salt (by mass) in this mixture?
The heat capacity of a bomb calorimeter is 87.5kJ/K . If 67.2g of methane is combusted under such reaction conditions, what will be the increase in temperature of the calorimeter? Delta E combustion
The molar heat of vaporization of benzene at 1atm is 30.8kJ/mol. The boiling point of benzene at 1atm is 78.3C. Calculate the entropy change when 11.5g if benzene boils at this temperature
at 25C, delta H for the combustion of liquid octane, to form CO2 solid and H2O liquid is -5471kJ/mol. Calculate delta E for this reaction at 25C.
A gas sample heated in a cylinder uses 650kJ of heat. A piston that compresses the gas does 800kJ of work. What is the change in internal energy of the gas during this process
It was later determined that each molecule of the unknown base could accept two protons. What is the molar mass of this unknown compound?
For a solution of 0.10M H3PO4, calculate the concentration of all the ionic species in solution (i.e., H+, OH-, H2PO4-, HPO42-, PO43-)
write out a balanced reaction of methyl salicylate with 2.0 M sodium hydroxide solution to yield, upon work-up with 6.0 M hydrochloric acid, salicylic acid and methanol 2) provide the complete mecha
Saturated acetone vapor enters a heat exchanger at a rate of 8.40 L/s and 1 atm, and emerges from the heat exchanger as a saturated liquid at the same pressure. Water at 1 atm enters the heat exchan
Enough water to make 2.00 L of solution is added to 25.00 mL of concentrated (18 M) sulfuric acid. What is the molarity of the resulting solution.
Calculate the volume in liters of a 0.024 micro M copper (II) sulfate solution that contains 11.0 mol of copper (II) sulfate
Ammonium phosphate is an important ingredient in many fertilizers. It can be made by reacting phosphoric acid with ammonia . What mass of ammonia is consumed by the reaction of of phosphoric acid? R
What assumption is commonly used to simplify the process of finding the pH for a solution of a weak acid
What would affect the chemical shift of the sp3 hybridized carbon atom that would cause its peak to appear at ~ 64 ppm
When the reaction A--> B + C is studied, a plot of [A]t vs. time gives a straight line with a negative slope. What is the order of the reaction
A gas-phase decomposition is first order with respect to the reactant, R. If the initial concentration of R is 1.0E-4 mol L-1 and the rate constant k=1.08E-6 s-1, what concentration of R remains aft
Compared to that of a saturated fatty acid, the melting point of an unsaturated fatty acid with an equal number of carbons will be
A box of volume 20.0 L contains 1.50 moles of an ideal gas. This gas initially consists of a single molecular species, X (molar mass of 42.0 g/mol), at a temperature of 25.0 °C.
A 5.00g sample of water vapor, initially at 155C is cooled at atmospheric pressure, producing ice at -55C. Calculate the amount of heat energy lost by the water sample in this process, in kJ.