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You want a solution of ethylene glycol, C2H4(OH)2, that has a glycol mole fraction of 0.125. How many grams of the glycol should you combine with 950 grams of H2O? What is the molality of the solut
A person with perfect pitch sits on a bus bench listening to the 455 Hz horn of an approaching car. If the person detects a frequency of 475 Hz, how fast is the car moving?
A car traveling 5m/s slams on its brakes, creating an acceleration of -2 m/s2. How far did the car travel after it applied its brakes?
If you want to prepare a solution that is .0512 molal in K2CO3, how many grams of the salt would you have to add to 250 g of H2O? What is the mole fraction of K2CO3 in the solution?
If 100.0 mL of 1.00 M NaOH and 100.0 mL of 0.500 M H2SO4solutions are mixed, what will the concentration of the resulting solution be?
A curve of radius 72 is banked for a design speed of 120 .If the coefficient of static friction is 0.35 (wet pavement), at what range of speeds can a car safely handle the curve?
.5 mL of bromobutane (MW= 137, density= 1.27 g/mL) was caused to react with excess sodium ethoxide (MW= 68.1) to afford ethoxy butane.
It will launch him in the air and he wants to come down so he just misses the last of a number of 1.00 m diameter barrels. If the speed at the instant when he leaves the ramp is 60.0 m/s, how many b
(a) If the speed of the pot as it passes Jill's window is 52.0 m/s, what was its speed when Jack saw it go by? (b) What is the height between the two window ledges?
A 18.5-kg sled is being pulled across a horizontal surface at a constant velocity. The pulling force has a magnitude of 84.5 N and is directed at an angle of 30.0° above the horizontal. Determin
Consider a mixture of air and gasoline vaporin a cylinder with a piston. The original volumeis 30.cm3. If the combustion of this mixture releases 1081. J of energy, to what volume will the gases exp
The load and the spring are taken down. Two people pull in opposite directions on the ends of the spring, each with a force of 190 N. Find the length of the spring in this situation.
X rays of wavelength 2.63 Ao were used to analyze acrystal. the angle of first order diffraction (n=1 in the bragg eq)was 15.55 degrees.
He finds that the acceleration due to gravity is constant at 0.8 m/s2.
The mole fraction of an aqueous solution of titanium(IV) iodite is0.328. Calculate the molarity of the titanium(IV) iodite solution,if the density of the solution is 1.15 g mL-1.
The space shuttle is the most complex machine ever built and the first orbital spacecraft designed for partial reusability. It has a mass of 2,209,203 kg and is capable of taking up to 11 astronaunt
Carbon diselenide (CSe2) is a liquid at roomtemperature. The normal boiling point is 125oC, and themelting point is -45.5oC. Carbon disulfide(CS2) is also a liquid at room temperature with normalboili
An observer in S' moving along x axis at speed v relative to S also observes two flashes, but the blue flash occurs 6μs before the red. What is the magnitude and direction of v?
A 70 kg. skydiver reaches a teminal velocity of 50 m/s. At what rate is the drag force dissipating his kinetic energy? How does this rate compare with his rate of change in potential energy?
Two source points S1 and S2 are emitting waves with wavelength .5m they are 1.75m apart. If a sound detector was to circle around the midpoint of the two sources, how many points are exactly in phas
A deep-sea diver uses a gas cylinder with a volume of 10.0L and acontent of 51.2 g of O2 and 32.6 g of He. Calculate the partial pressure of each gas and the total pressure if the temperature of the
a) Find the speed of the rock when it reaches the lowest point of its trajectory? b) What is the maximum tension in the string?
Draw lewis and line bond structures for formaldimine,CH2NH. How many electrons are shared in thecarbon-nitrogen bond? What is the hybridization of thenitrogine atom?
A roller coaster car starts with a speed of 12 m/s at point A (30 meters above the horizontal surface), travels down a hill and levels out at point B (15 meters above the horizonta surface), then tr
An electron in a hydrogen atom in the n = 6 energy level emits 109.4 kJ/ mol of energy in a transition to a lower energy level. To what energy level does the electron fall?