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The polyyne molecules CkH2 with alternating triple and single carbon-carbon bonds represent potential nanowires for molecular electronics. They can be modelled as linear 1D-boxes with 2k
You are participating in league bowling with your friends. Time after time, you notice that your bowling ball rolls to you without slipping on the flat section of track. What is the magnitude of the
Compare the relative greenness of this approach to at least one other extraction method: steam distillation or solvent extraction. List the green chemistry principles that differentiate the two appr
The water passing over Victoria Falls, located along the Zambezi River on the border of Zimbabwe and Zambia, How much internal energy is produced per kg as a result of the fall
One mole of an ideal gas is contained in a cylinder with a movable piston. The temperature is constant at 77°C. Weights are removed suddenly from the piston to give the following sequence of thr
An observer sees two spaceships moving in opposite directions, Find the speed of one spaceship relative to the other
A charged particle of mass .0020kg is subjected to a 5.0T magnetic field that acts at a right angle to its motion. what is the magnitude of the charge on the particle
A 5m length of wire cariying a current of 5A lies on a hoizontal table with a rectangular top of dimensions 3.00m x 4.00m. What magnetic force acts on this segment of wire
Calculate the change in entropy that occurs when 18.66 g of ice at -14.6°C is placed in 54.05 g of water at 100.0°C in a perfectly insulated vessel.
A 76 kg student traveling in a car with a constant velocity has a kinetic energy of 1.1 multiply.gif 104 J. What is the speedometer reading of the car in km/h
Draw the structure of the bromohydrin formed when (E)-3-methyl-3-hexene reacts with Br2/H2O.
A transformer with 580 turns in its primary coil has to decrease the voltage from 6380 V to 220 V for home use
A 43.0 g sample of Fe metal at 90.0°C is placed into 150.0 mL of water at 22.5 °C. After equilibrium is reached the final temperature of the system is 24.5°C. What is the specific heat c
A transformer has 900 turns on its secondary and 100 turns on its primary. The primary is connected to a 11-V source. What is the voltage output of the secondary
Hydrazine (N2H4) is a fuel used by some spacecraft. It is normally reacted with N2O4 according to the equation: N2H4(l) + N2O4 (g) 2 N2O(g) + 2 H2O (g) a) Identify the oxidizing agent and the reduci
A flashlight uses batteries that add up to 4.5 V and has a power output of 0.56 W. How much current is drawn from the batteries
An experiment shows that a dry 113-mL gas sample of a pure gas has a mass of 0.171 g at a pressure of 721 mmHg and a temperature of 32.0 °C. What is the molar mass of the gas
Draw a structural formula of an alkene or alkenes (if more than one) that undergo acid-catalyzed hydration and without rearrangement give 2-methyl-2-butanol as the MAJOR product
a 142 kg crate is placed on an inclined ramp. When the angle the ramp makes with the horizantal is increased to ALPHA, If the coefficient of static friction between the crate and the ramp is 0.65, wh
Given that C = 0.22 µF, and the initial plate charge is Q0. What is the resistance of the resistor across the capacitor
Use Table 6.3 or Appendix B to write balanced formation equations at standard conditions for each of the following compounds. (Type your answer using the format O3 for O3. Write all coefficients, ev
A 2.70 uF capacitor is charged to 80 uC and then placed in series with a 6.4 M ohms resistor and an open switch. What is the initial voltage across the capacitor
A bicycle has wheels with a diameter (DIAMETER, not radius) of 0.620 m. Find the linear acceleration of the bicycle
When 37.0 mL of 0.640 M H2SO4 is added to 37.0 mL of 1.28 M KOH in a coffee-cup calorimeter at 23.50°C, the temperature rises to 30.17°C. Calculate H of this reaction per mole of H2SO4 and K
Your eye (diameter 2.5 cm) is able to focus the image of a tree on your retina. What is the size of the image of the tree on your retina