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When CuCl2 is heated to 100C, the compound is dehydrated. If 0.235g of CuCl2 * x H20 yields 0.185 g CuCl2 on heating, what is the exact formula of the hydrate
An isotope of the element Thallium, Tl-206, undergoes beta decay with a half life of 3.1 minutes. what mass of the isotope will be left after 9.3 minutes have elapsed
the specific heat of aluminum is .215 calories per gram per degree celcius. calculate the amount of heath required to raise the temperature
In Ag+S8->Ag2S reaction, 2g of Ag and 2g of S8 are alowed to reac to completion what is limiting reactant, how many grams of Ag2S are produced, and how many grams of excess reagent remain
In the Bohr model of hydrogen, the electron moves in a circular orbit around the nucleus. Determine the angular speed of the electron
Considering the properties required of molecules for them to undergo steam distillation, explain why a treating mixture of vanillin and eugenol to steam distillation would result in distillation of
Based upon your experiences, suggest what would be the result if we heated a mixture of dichloromethane (bp 39-40 Celcius) and nappthalene (C10H8 with mp 80-82 degrees celcius and bp 218) to 60 degr
A bug is on the edge of a rotating record player moving toward a light positioned along the edge of record player as well. Determine the accelerations acting on the bug
Two violin strings are tuned to the same frequency, 294 rm/hrz. What will be the beat frequency heard
Show the boiling point of pure liquid A and B vapor curve, liquid curve The region where only liquid is present The region where only vapor is present The region in which an equilibrium between liqu
An 80-N crate slides with constant speed a distance of 5.0 m downward along a rough slope that makes an angle of 30 ° with the horizontal
A long string of tension T and mass density ÃŽ · is attached to a small sphere of mass m. What is the displacement of the string on the right side of the mass, yt(x,t)
A Cepheid variable has been found to have a period of 22 days, from this its luminosity is determined to be 2.8 x 1029 W, Use this information to calculate the distance to the Cepheid
How many half-lives are required for the number of radioactive nuclei to decrease to 1/1010 of the initial number
A power plant taps steam superheated by geothermal energy to 533 K (the temperature of the hot reservoir), determine the minimum amount of rejected heat
Suppose the gasoline in a car engine burns at 637 oC, while the exhaust temperature (the temperature of the cold reservoir) is 106 oC, Determine the ratio of the total work produced by both engines t
A sodium atom (Z = 11) contains 11 protons in its nucleus. Strictly speaking, the Bohr model does not apply, determine the corresponding radius r of the outermost Bohr orbit
A 5.0-kg projectile is fired over level ground with a velocity of 200.0 m/s at an angle of 30.0 ° above the horizontal
A force of 20 N holds an ideal spring with a 1-N/m spring constant in compression. The potential energy stored in the spring is
A copper wire has a total lenght of 28m. Half of the wire has a cross-sectional area of 6 mm^2, what is the current through this wire
A ring of charge of radius R meters has a constant charge density -lambda distributed uniformly along its length. Find the expression for |E| near the center of the ring
A vertically positioned charged disk of radius R contains a unfirom positive charge density sigma. Find the expression for the angle theta made between the disk edge and the length L
A huge explosion is heard 69.5 miles away. How long does it take the sound to travel that far
A test tone used on a radio has a frequency of 974 Hz. What is the wavelength of this sound in air at normal room temperature
The air inside a bicycle tire pump has 221 joules of work done on it as 60.1 joules of heat is conducted away from it