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If you had a mixture of three compounds phenacetin, acetaminophen and aspirin A TLC plate showed three spots of Rf 0.1 and 0.2 and 0.3 (1:9 ethanol: hexane).
A spring is hanging vertically from a ceiling. (Assume the spring's mass is negligible.) I hang a 0.5kg mass on the spring and let the spring slowly stretch to an equilibrium position. Then the spri
Each wheel is a disk of mass 2.0 kg. On the horizontal surfaces the center of mass of each wheel moves with a linear speed of 6.0 m/s. (a) What is the total kinetic energy of each wheel?
You have a stock solution of 14.8 M NH3. How many milliliters of this solution should you dilute to make 1000.0 mL of 0.250 M NH3?
A 0.5 kg box is sliding with a speed of 6m/s on a frictionless, level surface toward a spring of force constant k. It hits the spring and compresses it.
The blah taste of many processed orange juice brands results in part from the fact that the juice must be pasteurized by heating.
Two parallel sheets of aluminum foil separated by 0.1 mm are connected to a 9-V battery. The area of each sheet is 0.5 sq. m. (a) Find the electric field between the aluminum sheets.
Speedboat A negotiates a curve whose radius is 156 m. Speedboat B negotiates a curve whose radius is 238 m. Each boat experiences the same centripetal acceleration. What is the ratio vA/vB of the sp
Consider a solid of molecules where there are two states of lowest energy and one excited state at energy E. At 600k the probability of being in one of the two lowest energy states is 4/5. What is i
You have a certain mass of helium gas in a rigid steel container. You add the same mass of neon gas to this container. What happens assuming the temperature is constant?
If the coefficient of kinetic friction between the pad and the flywheel is µk = 0.2,how many revolutions does the flywheel make before coming to rest? How long does it take for the flywheel to
Explain the volume increase during transformation from austenite to ferrite. Why is the change in volume larger for transformation from austenite to martensite than for austenite to ferrite?
Determine how far apart Jordan should place the lenses, assuming that the final image is to be formed at infinity (relaxed eye viewing). Also assume that Jordan's near point is 25 cm. Using this inf
A 5.20 x 102 kg hot-air balloon takes off from rest at the surface of the earth. The nonconservative wind and lift forces take the balloon up, doing +9.70 x 104 J of work on the balloon in the proce
A skier slides horizontally along the snow for a distance of 23 m before coming to rest. The coefficient of kinetic friction between the skier and the snow is µk = 0.030. Initially, how fast w
Calculate the deltaHrxn for the combustion of glucose (C6H12O6) using deltaHf values. You will have to calculate the deltaHf of glucose using the following information. 6CO2(g)+6H2O(l)->C6H12O6(
An ideal gas at 7°C is in a spherical flexible container having a radius of 1.10 cm. The gas is heated at constant pressure to 88°C. Determine the radius of the spherical container after th
When liquid B is replaced with liquid C, total internal reflection occurs for angles of incidence greater than 55.0°. Find the ratio nB/nC of the refractive indices of liquids B and C.
A person pulls a toboggan for a distance of 20.0 m along the snow with a rope directed 30.0° above the snow. The tension in the rope is 96.0 N. How much work is done if the same tension is direct
A person accidentally swallows a drop of liquid oxygen, O2(l), which has a density of 1.149 g/mL. Assuming the drop has a volume of 0.035 mL, what volume of gas will be produced in the person's sto
Calculate the number of grams of KCl that can be made from 4.0g of KOH reacts with an excess of Cl 2. K=39, Cl=35, O=16, H=1.0.
The primary coil of an ideal transformer has 700 turns, and the secondary coil has 190 turns. A) If the primary coil carries 14 at a voltage of 120 , what are the voltage?
A total of 2.00mol of a compound is allowed to react in a foam coffee cup that contains 177g of water. The reaction caused the temperature of the water to rise from 21.0 to 24.7 C . What is the enth
A 280 kg log is pulled up a ramp by means of a rope that is parallel to the surface of the ramp. The ramp is inclined at 30.0° with respect to the horizontal.