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The vapor pressure of water at 20degreesC is 17.5 mmHg. What is the vapor pressure of water over a solution prepared from 2.00 x102g of sucrose(C12H22O11) and 3.50 x102g water?
The glass core of an optical fiber has an index of refraction 1.60. The index of refraction of the cladding is 1.48. What is the maximum angle a light ray can make with the wall of the core if it is
1.02g of acetylsalicylic acid was obtained from 2.00g ofsalicylic acid by reaction with 2.0g of acetic an hydride. Calculate the present yield of acetylsalicylic acid.
If a horizontal force pulling on block B is slowly increased, in a direction parallel to the connecting cord, until it is barely enough to make the two blocks start moving, what is the magnitude of
How many millimoles of sodium hydrogen are present in 28.6 mLof 0.150 m NaOH? How many grams of NaOH are present?1.6 g of salicylic acid was reacted with 1.5 g ofacetic anhydride was used in a the
A 100g ice cube at -10 degrees C is placed in an aluminum cup whose initial temperature is 70 degrees C. The system comes to an equilibrium temperature of 20 degrees C.
A plane flies 477 km east from city A to city B in 48.0 min and then 980 km south from city B to city C in 1.50 h. For the total trip, what are the (a) magnitude (in km) and (b) direction of the pla
How many grams of sucrose must be added to 320 g of wateto lower the vapor pressure by 1.5mm Hg at 25 degrees C? The vapor pressure of water at 25 degrees C is 23.8 mmHg and the molar mass of sucro
The mass is pulled so that the spring stretches 0.100 m. from the equilibrium position. Determine the following: a. amplitude b. total energy of the system c. magnitude of the velocity of the mass w
A dilute sugar solution prepared by mixing 8.0 g of an unknown sugar with sufficient water to form 0.200L of solution is found to have an osmotic pressure of 2.86 atm at 25 oC. What is the molar mas
A particular gaseous hydrocarbon that is 82.7% C and 17.3% H bymass has a density of 2.33g/L at 23oC and 746 mmHg. What is the molecular formula of this hydrocarbon?
Why does the addition of Br to trans-cinnamic acid take place more slowly than the addition of Br2 to 3-hexene or cyclohexene?
A traveling wave has displacement given by y (x,t) = (2.0 cm) x cos(2px-4pt), where x is measured in cm and t in s. What is the speed of the wave?
An alpha particle with kinetic energy 12.5MeV makes a collision with lead nucleus, but it is not "aimed" at the center of the lead nucleus, and has an initial nonzero angular momentum (with respect
Several factors are involved in determining the cooking times required for foods in a microwave oven. One of these factors is specific heat.
A proton beam in an accelerator carries a current of 150 µA. If the beam is incident on a target, how many protons strike the target in a period of 24.0 s?
Hypochlorous and hypotromous acid (HOCl and HOBr) are weekacid. Write equations for the ionization of each in water and predict which one is the stronger acid.
The wire is the re-formed into a single-turn square coil, which is used in the same magnetic field (again perpendicular to the plane of the coil and with a magnitude changing at the same rate). What
Without glasses, your Uncle Albert can see things clearly only if they are between 25 cm and 170 cm from his eyes. A) What power eyeglass lens will correct your uncle's myopia? Assume the lenses will
Acceleration is sometimes expressed in multiples of g, where g = 9.8 m/s2 is the acceleration due to the earth's gravity. In a car crash, the car's velocity may go from 26 m/s to 0 m/s in 0.15 s. How
When copper metal is added to silver nitrate in solution, silver metal and copper(II)Nitrate are produced. What mass of Silver is Produced from 178g of cu?
31 kg crate rests on a horizontal floor, and a 52 kg person is standing on the crate. Determine the magnitude of the normal force that the floor exerts on the crate.
Roughly speaking, the radius of an atom is about 10,000 times greater that that of its nucleus. If an atom were magnified so that the radius of its nucleus became 3.0cm, what would be the radius of
In an avalanche, a mass of snow and ice high on a mountain breaks loose and starts an essentially frictionless "ride" down the mountain on a cushion of compressed air.
You are told that an acid is either hydrochloric acid orperchloric acid. What simple test could you carry out to tell which acid it is?