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Sam, whose mass is 80 kg, takes off accross level snow in his jet powered skis. The skis have a thrust of 212 N and a coefficient of kinetic friction on snow of 0.1. Unfortunatately, the skis run ou
0.035M O2(g) AND end with 0.012M NO2, what is the equilibrium constant for this reaction and what are the equilibrium concentrations for NO and O2?
What is the theoretical yield of bismuth when 393 g of Bi2O3 reacts with excess carbon as shown below?
a tank containih 115 moles if neon gas it has a pressure of 57 atm at a temperature of 45 celsius. calculate the volume of the tank.
A disk with a 1.0-m radius reaches a maximum angular speed of 18rad/s before it stops 35 revolutions (220 rad) after attaining the maximum speed. How long did it take the disk to stop?
In a titration experiment, a 12.5 mL sample of 0.0500 M KOH neutralized 14.7 mL of HNO3 solution. Calculate the molarity of the HNO3 solution.
The volume of a drop of rain was found to be 0.448 ml at N.T.P. How many molecules of water and number of atoms of hydrogen are present in this drop?
Which of the following statements describes KCl (aq)?
Suppose that 1.02 of rubbing alcohol evaporates from a 70.0 aluminum block. If the aluminum block is initially at 25, what is the final temperature of the block after the evaporation of the alcohol?
at the bottom of 30 ft of liquid is 50 psia what is the density in lbs/ft cube?
If the amount of radioactive Iodine-123 in a sample decreases from 0.4g to 0.1g in 26.4 hours, what is the half- life, in hours of iodine-123.
What will happen to the membrane potential if the membrane suddenly becomes selectively permeable to K+ (but not Cl-)? What happens if you then add NaCl to one side only?
Arrange these hydrates in order of increasing percent water content. (Use the appropriate <, =, or > symbol to separate substances in the list. Compose the list using the appropriate formulas.
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)?