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What mass of sucrose should be combined with 550 g of water to make a solution with an osmotic pressure of 8.65 atm at 295 K? (Assume the density of the solution to be equal to the density of the so
A loudspeaker of mass 23.0 is suspended a distance of = 2.40 below the ceiling by two cables that make equal angles with the ceiling. Each cable has a length of = 4.00 . What is the tension in each
It is placed into a container of water at 17C. What mass of water was in the container? The specific heat of water is 4.184j/g C and of silver is 0.24J/gC.
Calculate the mass percent of a solution that is prepared by adding 72.6 g of NaOH to 418 g of H2O.
A car drives north at 46 mi/h for 10 {rm min} and then turns east and goes 5.0 {rm mi} at 56 mi/h. Finally, it goes southwest at 30 mi/h for 6.0 {rm min} Determine the car's displacement.
A student in a research lab tells you that she has isolated a protein that she thinks binds to DNA. Why is the student surprised?
Evaluate the average kinetic and potential energies, <Ekinetic> and <Epotential> , for the ground state (n=0) of the harmonic oscillator by carrying out the appropriate integration.
3.5 g of a hydrocarbon fuel is burned in a vessel that contains 250. grams of water initially at 25.00 C. After the combustion, the temperature of the water is 26.55 C. How much heat is evolved per
A spring is mounted at an angle of = 31 on a frictionless incline as illustrated in the figure below. The spring is compressed to 15 cm where it is allowed to propel a mass of 4.4 kg up the incline.
The men's world record for the shot put, 23.12 m, was set by Randy Barnes of the United States on May 20, 1990. If the shot was launched from 6.00 ft above the ground at an initial angle of 42.0 deg
You have a sample that includes equimolar amounts of protein, dsDNA, ssDNA and typical eukaryotic mRNA. Briefly describe the sequence of steps that you would take using a diagram. Must have diagram.
System conducts 1.30x10^2 cal heat to srroundings while delivering 316 cal work. What is the change in internal energy of the system (in Cal)?
(a) How high above the ground is the highest point that the skateboarder reaches? (b) When the skateboarder reaches the highest point, how far is this point horizontally from the end of the ramp?
Three gases, hydrogen, helium, and krypton are confined in a 10.0 L vessel at a pressure of 6.00 atm. The vessel contains 4.00 moles of hydrogen, 3.00 moles of helium, and 5.00 moles of krypton. Wh
An electron moves in a circular path perpendicular to a uniform magnetic field with a magnitude of 2.2 mT. If the speed of the electron is 1.3 107 m/s, determine the following. (a) the radius of the
Calculate the pH of 0.45 M K2CO3. What are the concentrations of HCO3-, and H2CO3 in the solution? H2CO3 is a diprotic acid with Ka1 = 4.3 x 10-7 and Ka2 = 4.7 x 10-11.
Three atoms of iron (Fe) are to be combined with four molecules of oxygen (O2). How many total iron atoms and oxygen molecules will be combined during the formation of Fe3O4?
Flourine gas reacts with ammonia gas to form N2F4 and HF. How many grams of NH3 are required to form 130 grams of HF?
A 5.50 bullet is fired horizontally into a 1.30 wooden block resting on a horizontal surface. The coefficient of kinetic friction between block and surface is 0.200. The bullet remains embedded in t
Why does adding 6 M HCI to the yellow solution of methyl orange tend to cause the color to change to red? (Note that in solution HCI exists as H+ and Cl ions.)
Above that are the mantle and crust. if the average density of the Earth is 5.5 g/cm^3, what is the average density of the Earth's mantle and crust?
What is the root mean sqaure velocity of an sulfur molecule at 275 degrees?
when you heat popcorn, it pops because it loses water explosively. Assume a kernel of corn, weighing 0.125 g, weighs only 0.106 g, after popping. Calculate the percentage of water in the kernel of c
Write a350- to 700-word essay in which you compare and contrast the influence of heredity and hormones on human behavior.
Write a Literature review on application of geophysical techniques using electromagnetic induction as a tool for sustainable soil and water management of agricultural fields in the humid tropic Car