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A 1.70-g sample of a large biomolecule was dissolved in 14.0 g of carbon tetrachloride. The boiling point of this solution was determined to be 77.85°C. Calculate the molar mass of the biomolecu
Calculate the energy levels of the pi-network in octatetaene, C8H10, using the particle in the box model. To calculate the box length, assume that the molecule is linear and use the values 135 and 1
Analysis shows that the tank pressure is 1.34 atm (at 24.0°C) if the CO2 is removed. Another experiment shows that 0.0870 g of O2 can be removed chemically. What are the masses of CO and CO2 in
Using p-aminobenzoic acid, give equations showing how procaine and procaine monohydrochloride could be prepared. which of the two possible amino functional groups in procaine will be protonated fir
Kilimanjaro in Tanzania is the tallest peak in Africa (19,340 ft.). On a particular day, the barometric pressure at the top of the mountain was 341 torr. On that day, at what Celsius temperature did
A solution of 120 mL of 0.150 M KOH is mixed with a solution of 260 mL of 0.200 M NiSO4. How many grams of the precipitate can be formed?
What is the condensed structural formula of nonane?
A sample of gas occupies a volume of 364 mL at 1.28 atm and 27 oC. Calculate the volume of the gas if its temperature is changed to 57.0 oC while its pressure is held constant.
Kilimanjaro in Tanzania is the tallest peak in Africa (19,340 ft.). On a particular day, the barometric pressure at the top of the mountain was 359 torr. On that day, at what Celsius temperature did
Draw a six-carbon-chain portion from syndiotactic polypropylene, in which the groups lie on alternating sides of the plane of the computer screen. represents the continuation of the polymer chain.
What volume of pure oxygen gas (O2) measured at 546 K and 1.00 atm is formed by complete dissociation of 0.7 mol of Ag2O?
What is the percent yield of a reaction in which 244 g phosphorus trichloride reacts with excess water to form 144 g HCl and aqueous phosphorus acid (H3PO3)?
In an experiment, a piece of copper is weighed 40.0 g and allowed to react with oxygen. {rm 2Cu}(s) + {rm O_2}(g) to {rm 2CuO}(s) How many grams of {rm CuO} could be produced according to the equation
The electron in the n = 5 level of a hydrogen atom emits a photon with a wavelength of 1280 nm. To what energy level does the electron move?
A steel cylinder holds 150.0 mol argon gas at 25 degrees C and a pressure of 9.53Mpa. After some argon has been used, the pressure is 2.00Mpa at 19 degrees C. What mass of argon remains in the cylin
Assuming the reaction is first order, when equal volumes of the two solutions are mixed, what is the initial rate at 40oC?
A furniture factory needs 31.5 ft2 of fabric to upholster on a chair. Its Dutch supplier sends the fabric in bolts of exactly 200 m2. What is the maximum number of chairs that can be upholstered by
A gas is contained in a 5.0 l container at a pressue of 100kPa. What size container would be required to contain the gas at a pressure of 50 kPa, Assuming constanat tempature?
What is the molecular mass of met-enkephalin if 20.0 of an aqueous solution containing 15.0 met-enkephalin at 298 supports a column of water 32.9 high?
The dry ice is allowed to sublime (convert from solid to gas) and the mixture is allowed to return to 25.0 C. What is the total pressure in the flask?
Calculate the final concentration of each of the follwing; 0.50 L of a 4.0 M HNO3 solution is added to water so that the final volume is 8.0L ( I dont want the answer I would like to know how to do
What is the radius of the cross section of a cylinder that has a volume of 644.0 m3 and a height of 12.6 m? (Volume=πr2×height)?
a nitrogen molecule is confined in a cubic box of volume 1.00m^3. assuming that the molecule has an energy equal to 3/2kT=300K, what is the value of n=(n(subx)^2+n(suby)^2+n(subz)^2)^(1/2) for this
How does the lewis acid play a role in the mechanism? If it bonds to the double bond O in dimedone, then what is the leaving group during elimination?
The density of liquid water at 0 degrees C is 0.9987 g/cm cubed; the density of ice at this same temperature is 0.917 g/cm cubed. Calculate the volume occupied at 0 degrees C by 100. g of liquid wat