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The first-order rate constant for the decomposition of a certain antibiotic in water at 20 degrees celsius is 1.65 yr^-1. If a 6.0 x 10^-3 M solution of the antibiotic is stored at 20 degrees cels
The chlorination of pentane gives a mixture of three monochlorinated products.
Suppose you spread 0.85 g of this oil over the surface of water in a large dish with an inner diameter of 21.6 cm. How thick is the oil layer? Express the thickness in centimeters.
A 125ml flask and stopper have a mass of 79.310g. A 25.0ml sample of an unknown organic liquid is pipetted into the flask, and the flask, stopper, and liquid have a total mass of 97.010g . Find the
Jane is making a suit wich requires 2 5/8yards for the jackets and 1 3/4 yards for the skirts. What is the total amount of material she needs?
Butane's molar enthalpy of vaporization is 22.44KJ/mol and it's normal boiling point is -0.40C. What is the equilibrium vapor pressure under these conditions?
When 0.455g of Thyroxine is dissolved in 10.0g of benzene, the freezing point of the solution is depressed by 0.3000C. What is the molar mass of Thyroxine?
Two blocks are attached over a massless, frictionless pulley,Initially the left mass(5kg) is touching the floor, the right(15kg) is 2m up and they are released from rest. Just before the right hits
A car traveling at 30m/s overtakes another car only going 25m/s. When the faster car is still behind the slower car, it sounds a horn of frequency 1500Hz. What is the frequency heard by the driver i
How many grams of sodium carbonate, silver nitrate, silver carbonate, and sodium nitrate are present after the reaction is complete.
Our Milky Way galaxy is 100,000 ly in diameter. A spaceship crossing the galaxy measures the galaxy's diameter to be a mere 1 ly. What is the speed of the spaceship relative to the galaxy? and How l
Isotope 1 has a mass of 107.0 amu and an abundance of 55.9%. Isotope 2 has a mass of 109.0 amu. What is the atomic mass of the element?
During the time 0.315 mol of an ideal gas undergoes an isothermal compression at 21.0°C, 530 J of work is done on it by the surroundings.
An impure sample of potassium hydrogen phthalate, KHP, having a mass of 84.02 g was dissolved in water. How many mol of NaOH and KHP were used in the reaction?
Question: In a magnetic field with B=0.50 T, for what path radius will an proton circulate at 0.10 to the speed of light? What will its kinetic energy be? What will change if we replace a proton wit
A sample of helium gas occupies 90L at 14 degrees Celsius and 0.956 atm. What volume (L) will it occupy at 155 degrees Celsius and 0.956 atm. Need to convert degress Celsius to Kalvin.
Gravity fed intravenous infusions are made possible by hanging a bag of fluid above the patient. If blood pressure is 18 mm Hg above atmospheric pressure, find the minimum height of the bag such tha
An RL circuit has a V = 7V battery, a R = 15000 Ohm resistor, and a L=0.7H, connected in series with a switch. The switch is left open for several seconds and then closed at time t = 0. (a) What is
Calculate the molar mass of naphthalene given that a solution of 2.11g of naphthalene in 100g of benzene has a freezing-point depression of 0.85 degrees C.
What volume of 0.200 M K2Cr2O7 would be required to exactly react with 43.9 mL of 0.150 M KI in acidic solution? The products include Cr3+ ion and I2. What was reduced in the reaction and what wa
Write down the Lorentz Transformation matrix for motion along the z direction with velocity v.
Question: A system consisting entirely of electrons and alpha particles has a net charge of 1.84*10^-15C and a net mass of 4.56*10^-23 kg. How many electrons and alpha particles are in this system?
Ultrasonic acoustic waves are diffracted by a pair of parallel slits 100mm apart. The zeros in the diffraction pattern are spaced at angular intervals of 8.3 degrees. Calculate the wavelength.
Lithium has two stable isotopes, 6Li and 7Li. If a sample is composed of 41% of the lighter isotope (with the balance being 7Li), calculate the average molar mass of the sample.
Using concepts of molecular velocity and collisions of molecules, explain the relationship between pressure & volume and pressure & moles.