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The smallest atoms can themselves exhibit quantum mechanical behavior. Calculate the de Broglie wavelength (in pm) of a hydrogen atom traveling 430 m/s.
An unknown mixture of these two components produces peak areas of 1501 units (2-pentanone) and 1712 units (1-nitropropane). Use these areas and the response factors above to determine the weight % o
The solubility f suberic acid is 0.14g/100mL of water or 0.56g/100mL of ether. Calculate the volume of ether needed to remove 90% of the suberic acid from 100mL of saturated aqueous solution in a s
An effusion apparatus can be used to determine molecular weights. In one experiment the effusion of CHCl3 is detected to be 10.35 min and in a separate experiment an unknown gas is detected at 6.54
Why is it proposed that the alcohol functional group is protonated by aid before dehydration can occur via either E1 or an E2 mechanism?
In the determination of the specific heat of a metal, why is it desirable to use the minimum volume of water that will allow immersion of the metal sample?
Use some simple math to demonstrate the amount of CO2 exhaled by a typical human per year. Please base your calculations upon the burning of 2000-3000 calories per day for 365 days per year.
Compare the masses of potassium hydrogen phthalate (204.22g/mol); potassium hydrogen iodate (389.91g/mol); and benzoic acid (122.12g/mol) needed for a 300.00mL standardization of 0.0400M NaOH.
What tecnhique is used to separate the active ingredient from each of these compounds: citric acid, sodium benzoate, polyethylene glycol, sodium saccharin?
What is the limiting reactant?How many grams of this precipate form? What is the concentration of each ion that remains in solution?
If you had a mixture of three compounds phenacetin, acetaminophen and aspirin A TLC plate showed three spots of Rf 0.1 and 0.2 and 0.3 (1:9 ethanol: hexane).
You have a stock solution of 14.8 M NH3. How many milliliters of this solution should you dilute to make 1000.0 mL of 0.250 M NH3?
The blah taste of many processed orange juice brands results in part from the fact that the juice must be pasteurized by heating.
You have a certain mass of helium gas in a rigid steel container. You add the same mass of neon gas to this container. What happens assuming the temperature is constant?
Explain the volume increase during transformation from austenite to ferrite. Why is the change in volume larger for transformation from austenite to martensite than for austenite to ferrite?
Calculate the deltaHrxn for the combustion of glucose (C6H12O6) using deltaHf values. You will have to calculate the deltaHf of glucose using the following information. 6CO2(g)+6H2O(l)->C6H12O6(
An ideal gas at 7°C is in a spherical flexible container having a radius of 1.10 cm. The gas is heated at constant pressure to 88°C. Determine the radius of the spherical container after th
A person accidentally swallows a drop of liquid oxygen, O2(l), which has a density of 1.149 g/mL. Assuming the drop has a volume of 0.035 mL, what volume of gas will be produced in the person's sto
Calculate the number of grams of KCl that can be made from 4.0g of KOH reacts with an excess of Cl 2. K=39, Cl=35, O=16, H=1.0.
A total of 2.00mol of a compound is allowed to react in a foam coffee cup that contains 177g of water. The reaction caused the temperature of the water to rise from 21.0 to 24.7 C . What is the enth
The mass of an electron is 9.11\times 10^{-31}~\rm kg. If the de Broglie wavelength for an electron in a hydrogen atom is 3.31\times 10^{-10}~\rm m.
On Venus the surface atmospheric pressure is about 90 Earth atmospheres. What is the Venusian atmospheric pressure in kilopascals?
An antacid tablet requires 25.82 mL of 0.200 M HCl to titrate to its endpoint. What volume in milliliters of stomach acid can be neutralized by the antacid tablet? Assume that somach acid has a pH
Explain why you would expect deltaH neutzn for HBr reacting with NaOH solution and deltaH nertzn for HNO3 reacting with KOH solution would be identical. Write appropriate equations to support this
A 51.6 mL dilute solution of acid at 23.85 degrees Celsius is mixed with 48.5 mL of a dilute solution of base, also at 23.85 degress C, in a coffee-cup calorimeter. After the reaction occurs, the te