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Suppose you might consider whether the de Broglie wavelength is a significant fraction of the likely size of the object in question: for classical objects.
An aqueous solution is made by dissolution of the (0.009 mol) of (KOH) and (0.045 mol) of butanoic acid in the 9 kg of water.
In a particular reaction, 6.0 moles of NH3 were formed. Determine how many moles of H2 and determine the numbers of moles of N2 were reacted to form this amount of NH3?
Determine the initial molar concentration of I- (at time= 0, before reaction) if 4.0 mL of 0.30 M KI is mixed with 1.0 mL of demonized water, 1.0 mL of buffer solution, 1.0
Discuss why does sweet & low cause a persons scalp to stop feeling itchy while there is tint on their hair (and scale), without causing the tint to stop processing?
The toxic gas hydrogen cyanide, HCN is water soluble. Illustrate a simple picture of HCN and H2O molecules and find out all of the interactions that may occur between the different molecule
Assume you have available 2.50 L of a solution (d=0.9767 g/mL) that is 13.8% ethanol (C2H5OH), by mass. From this solution you would like to make the maximum quantity of ethanol-water antifreeze sol
Why is the volume of hexane not a factor in forming the monolayer of stearic acid? The stearic acid solution is >99% hexane. Stearic acid is also soluble in acetone, explain which has a lo
The recommended procedure for preparing a very dilute solution is not to weigh out a very small mass or measuring a very small volume of a stock solution. A sample of KMnO4 was dissolved in the wate
Calculate the molality and molarity of the acid solution if the concentrated sulphuric acid we use in the laboratory is 98% H2SO4 by mass. The density of the solution is 1.83g/mL
A glass capillary tube is placed in a beaker containing a substance in its liquid state. After an hour the liquid shows no tendency to move up the tube.
Determine the name of the group that contains sodium? Oxygen? The last vertical row? Explain what has the largest ionization energy: beryllium, lithium, nitrogen, or oxygen; why?
Determining all the five possible electron domain geometries is it possible for any covalent molecule which is having only one central atom and having two or more attached atoms and one non-bonded e
In the presence of a catalyst, Ea is reduced to 32kJ. The activation energy of a certain reaction is 55 kJ. For the reaction, ΔH is +25 kJ. Sketch a diagram and add the curved for the catalyze
What will be the pH change of the stomach acid resulting from the ingestion of one Regular Strength Maalox, assuming the volume of the stomach to be 1.0 L.?
Determine the heat given off by the burning the Mg, in KJ/g and in KJ/mol. A 0.1375-g sample of solid magnesium is burned in a constant-volume bomb calorimeter that has a heat capacity of 3,02
In the benzyl synthesis the reaction mixture cools to 50-60degrees C before addition to water. The temperature does not need to be exact. Discuss how can you tell without using thermometer that the
If 10.0mL of 0.100 M NaOH titrate is to be used to back titrate the excess 0.100 M HCl from the analysis of one-third of a Maalox tablet, determine the numbers of milliliters of
The hydrochloric acid that is not neutralized by the antacid is titrated to a bromophenol blue endpoint with 6.22mL of 0.0827M NaOH when a 0.196-g sample of a CO32- antacid is di
Calculate the mass of CaCO3 in the sample, assuming the active ingredient in the antacid sample is CaCO3. Determine the percent active ingredient in the antacid sample?
Calculate how many grams of calcium were added to the water? What is the molality of the resulting calcium hydroxide solution when an unknown mass of calcium metal is placed in 200g of water, 103mL
Identify the molarity of the hydrofluoric acid solution? In a titration 33.21ml 0.3020M rubidium hydroxide solution is required to exactly neutralize 200.00mL hydrofluoric acid solution.
Determine what kinds of intermolecular attractive forces (dipole - dipole, London, hydrogen bonding ) are present in the following substances:
Evaluate the wavelength of a photon (in nanometers) that is emitted when an electron moves from the n1= 5 to the n2= 2 state in a hydrogen atom? Explain what will be the color of the emitted photon
Determine the Ph at the equivalence point for the following titration: 0.20 M HCl versus 0.20 M methylamine (CH3NH2).