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When benzeneand toluene are at the sme concentration te gas chromatogramproduces a peak height for benzene that is 3.74 times greater thanthat of toluene.
1.443 g sample of CaCO3 mixture is treated with Hydrochloricacid, evolving CO2 gas. After the reaction, the mixture has a massof 1.194 g.
The atomic mass of element X is 33.42 amu. A 27.80 g sample of X combines with 90.10 g of another element Y to form a compoundXY. Calculate the atomic mass of Y.
Allicin is the compound responsible for the characteristic smell of garlic. An analysis of the compound gives the followingpercent composition by mass: C: 44.4%; H: 6.21%; S:39.5%; O: 9.86%.
A 22.8g bullet , moving initially at 690m/s, penetrates 7.44cm into a solid wall. a) What work is done by the wall while stopping the bullet? b) Assume the force of the wall on the bullet is constan
What is its power output in watts? c) At a food conversion efficiency of 7.44%, how many food calories ( one food calorie=4190 joules) must be taken from the daily diet for the heart?
When conducting a simple experiment involving placing a small quantities of corn syrup in dialysis tubing and an equal amount of water in a second piece of tubing.
When light of wavelength 700nm is used in a single slit diffraction pattern , the central maimum has a width of 3.5cm. When the light source is replaced by one of wavelength 500nm, what central widt
High altitude balloons used by the weather office to measureO3 levels in the atmosphere also use a similar idiometric titration where the iodine liberated is measured by back titration with sod
A laser beam is shown through a grating and a first order maximum is produced at an angle of 25 degree. At what angle is the second-order maximum is produced?
What percentage of hydrogen peroxide has been decomposed in Mixture #1 when 20.0 ml of O2 gas has been evolved? Asume your room temperature, 740 torr of pressure, and a density of 3% H2O2 of 1.00g/m
How many grams of KIO3 are required to make a potassiumiodate (KlO3) solution of 0.015 mol * L-1and how many mL of H2O are required?
A point charge q1 = 5.00nC is placed at x = 4.00cm, and a second point charge q2 = -3.00 nC is placed at x= 6.00 cm. a) What is the magnitude and direction of the electric field due to the charges, at
A golfer hits a shot to a green that is 13 m below the point where the ball is struck. The ball leaves the club at a speed of 21 m/s at an angle of 42 degrees above the horizontal. It rises to its m
A solution is prepared by dissolving 19.1 g ammonium sulfate in enough water to make100.0 mL of stock solution. A 15.00 mLsample of this stock solution is added to 55.00 mL of water.
A 0.440-µF capacitor is connected across the terminals of a variable frequency oscillator. (a) What is the frequency when the reactance is 6.81 kO?
A variable capacitor with negligible resistance is connected to an ac voltage source. By what factor does the current in the circuit increase if the capacitance is increased by a factor of 7.0 and t
7 million gallons per day (MGD) of a conservative substance, with concentration 13.5 mg/L, is released into a stream having an upstream flow of 20.0 MGD and substance concentration of 5.0 mg/L.
How much work does each force perform on the box while the box moves 5 meters?
A 50.0 kO resistor is connected with a 30.0 µF capacitor and a 15.0 V battery with negligible internal resistance. Find the time for the capacitor to be charged from 0 to 75% of its maximum ch
When performing sn2 chemistry- synethesis of 1-bromobutane from butan-1-ol, what would be the purpose of refluxing the RXN mixture for 30 minutes instead of just boiling and what would need modified
What is the maximum force in N that can be supported by the wire if the design stress is 95.5 MPa and allowable deformation is 1.2 mm? The wire is made from stainless steel.
A 250 g disk moving north at a speed of 8 m/s on a frictionless, horizontal air table collides with a 400 g disk moving east at a speed of 5 m/s. a) what is the magnitude of the total momentum after
When 5.00mL of a sodium nitrate solution containing 17.04g/L ofsodium nitrate is added to 25.00mL of sulfamic acid solution containing 2.754g/L of sulfamic acid, the following reaction occurs: