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The flask shown here contains 0.649 g of acid and a few drops of phenolphthalein indicator dissolved in water. The buret contains 0.160 M NaOH. The volume of end point titration is 20.5ml. What is the molar mass of the acid (assuming it is diprotic and that the end point corresponds to the second equivalence point)?
Select all of the correct statements about reaction rates from the choices below. The lower the rate of a reaction the longer it takes to reach completion.
For the following reaction, if 11.2 L of Nitrogen are reacted to form NH3 at STP, How many liters of Hydrogen will be required to completely consume all of the nitrogen.
Explain what is the unit that forms the basis of the glycogen polymer. The enantiometric forms of 2-bromopentate. The mirror-image isomers aren't superimposable on each other. If you replace Br with CH3 will compound be chiral
How would you distinguish experimentally between an amphourous, a crystalline and a crosslinked polymer
An endothermic chemical reaction with ?E = +41 kJ/mol has an activation energy of +95 kJ/mol. What is the activation energy for the reverse reaction?
Find a corresponding criterion for processes at constant V and T. The new thermodynamic variable that is used to express this criterion is called the Helmholtz free energy
Problem- What molarity of propanoic acid, C3H6O2 (Ka = 1.3 x 10-5), is required to produce an aqueous solution with pH = 2.40?
the distance between layers in a crystal is 321 pm. x rays are diffracted from these layers at an angle of 45.6deg.
Coniine, a toxic substance isolated from a poison hemlock, contains only carbon, hydrogen, and nitrogen. Combustion analysis if a 5.024mg sample yields 13.90mg of CO2 and 6.048mg of H2O. What is the empirical formula for Coniine
how do you calcalculate a cube of an unknown metal measures 1.61mm on one side. the mass of the cube is 36mg. which of
A process involving a perfect gas is carried out in which the temperature changes at constant volume. First, the process is carried out for a fixed value of ?T and the mass of the gas is doubled. Then, the process is repeated with the same initial..
when 1.0g of salicyclic acid is used with 2mL of acetic anhydride, which compound is the limiting reagent?
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