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The decomposition of dimethyl ether, (CH3)2O(g) -> CH4(g) + H2(g) + CO(g), is first-order with a half-life of 1733 s at 500oC. In an experiment at this temperature, if [(CH3)2O
When 3.56 g of an unknown hydrocarbon was dissolved in 125 g of benzene, the freezing point of the solution was found to be 4.41oC. Analysis of the hydrocarbon showed that it contained 93.71% carbon (
When is extraction an appropriate technique for separation (ex: is there an ideal sample size range, is there a minimum starting purity, what final purity should be expected, etc.)?
In the titration of an impure sample of KHP, it was found that 30.6 mL of 0.100 M NaOH was required to react completely with 0.745 g of sample. What is the percentage of the KHP in this sample?
Calculate the frequency of a photon emitted when an electronof a hydrogen atom drops from energy level n=5 to n=3.
If 1 kg of hydrogen is completely burnt in oxygen and the heat released is used to convert water to steam, how much mass of water can be converted to steam?
A 33 g ice cube at its melting point isdropped into an insulated container of liquid nitrogen. How much nitrogen evaporates if it is at its boiling point of 77 K and has alatent heat of vaporization
According to the VSEPR theory, what should be the shapearound each carbon atom, in a molecule of cubane? What bond anglesare associated with that shape?
Trichloroacetic acid (CCl3CO2H) is acorrosive acid that is used to precipitate proteins. The pH of a0.050 M solution of trichloroacetic acid is the same asthe pH of a 0.040 M HClO4
Compound A (C9H12) absorbed 3 equivalents ofH2 on catalytic reduction over a palladium catalyst to give B (C9H18). On ozonolysis, compoundA gave among other things, a ketone described ascyclohexa
Arvin the Ant is on a picnic table. He travels 30 cm eastward, then 25 cm northward, and finally 15 cm westward. What is the magnitude of Arvin's net displacement?
A pirate ship fires a 25kg cannonball with a velocity of 100m/s at another very heavy trader ship. the ship is at rest. the cannonball bounces off with a velocity of -0.5m/s. a) How much energy was
An object moves at a constant velocity of 11 m/s to the southwest for an interval of 20 s. Halfway through this interval, what is the magnitude of its instantaneous velocity?
An object, initially moving in the negative x-direction, is subjected to a change in velocity in the positive y-direction. If the resulting velocity vector is drawn from the origin, into which quadr
A charged belt, of width d, travels at speed v between a source of charge and a sphere. The belt carries charge into the sphere at a rate corresponding to a current i. Compute the surface charge den
The cost of energy delivered to residences by electrical transmission varies from $0.070/kWh to $0.258/kWh throughout the United States; $0.110/kWh is the average value.
A convex mirror of radius of curvature 1.59 m is placed 0.336 m from a chess piece which is on the reflecting side of the mirror. What is the position of the image? Answer in units of m.
One of the floats in a Thanksgiving Day parade requires four people pulling on ropes to maintain a constant speed of 3.0 km/h for the float. The float is pulled in a straight line for 1.5 km.
A convex lens forms a real image 0.4 times the size of the object. The object distance is 17.1429 cm. Find the focal length of the lens.
Before setting up the laboratory model, your task is to calculate the constant velocity of the bar sliding down the ramp on rails in a vertical magnetic field as a function of the mass of the bar, t
A student adds two vectors with magnitudes of 200 and 40. Which one of the following is the only possible choice for the magnitude of the resultant? Please show your work.
A woman who can row a boat at 5.2 km/h in still water faces a long, straight river with a width of 5.2 km and a current of 3.5 km/h.
A dog running in the +y-direction at 6.2 hears its owner call from behind, and 2.3 later it's running at the same speed in the opposite direction.Compute the dog's change in velocity. Compute the do
A baseball player slides into second base with an initial speed of 7.80 m/s. If the coefficient of kinetic friction between the player and the ground is 0.45, how far does the player slide before co
How many photons per second are emitted by a monochromatic light bulb (wavelength= 650nm) that emites 55W of power?