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A 40.0 kg child takes a ride on a Ferris wheel that rotates four times each minute and has a diameter of 18.0 m, What is the centripedal acceleration of the child
calculate the molarity of of the following solutions 6.57g of methanol ( CH3 OH) in 1.50 x 10^2 mL solution
A gas mixture containing methane and n-butane enters an absorber tower at 20°C and a flowrate of 125 m 3 /h. The partial pressures at these conditions are 105 kPa for methane and 580 kPa for n-b
A battery is designed to have an EMF of 12.0V. When the battery is connected to an unknown resistor in series the terminal voltage drops down to 10.0V. what is the value of the unknown resistor
Suppose you are given 150 mg of an unknown mixture that contains three compounds, and you are told to separate the compounds using column chromatography, using alumina as a stationary phase. How wou
What is the partial pressure of each of the components. b. If the temperature is raised to 45°C, will the partial pressures change? If so, what will they be
You have two identical containers, one containing gas A (mA = 6.64 ×10?27 kg) and one containing gas B (mA = 1.39 ×10?27 kg). At what temperature will you accomplish your goal
The column is run with a solvent system based on hexanes, but which becomes more polar with the addition of more and more dichloromethane over time. Predict the elution order.
The complete combustion of propane, C3H8(g), is represented by the equation: C3H8(g) + 5 O2(g) ? 3 CO2(g) + 4 H2O(l) ?H° = -2220 kJ How much heat is evolved in the complete combustion of 12.5 L
Electrons are accelerated through a voltage difference of 265 kV inside a high voltage accelerator tube. What is the final kinetic energy of the electrons
A centrifuge in a medical laboratory rotates at an angular speed of 3450 rev/min. Find the constant angular acceleration of the centrifuge
Urea (NH2)2CO is prepared by reacting ammonia with carbon dioxide. The byproduct is water. 637.2g of ammonia are reacted with 787.3 g of carbon dioxide. Which of the two reactant is a limiting react
A wave pulse travels down a slinky. The mass of the slinky is m = 0.85 kg and is initially stretched to a length L = 6.5 m. What is the speed of the wave pulse
Ferrocene eluted from the column first and acetylferrocene second, but ferrocene ended up as the higher of the two spots during TLC analysis. Explain.
The density of magnesium oxide is 3.58 g /cm3. Given that the radius of the O2- ion is about 140 pm in most oxides, calculate the radius of Mg2+, in pm. Your solution should include a sketch one fac
The half life for the radioactive decay (first order process) of 32P is 14.2 days. How many days would be required for a sample of radiopharmaceutical containing 32P to decrease to 20% of its initia
The work done by an external force to move a 6.50 uC charge from point a to point b is 0.0240 J. The charge started from rest, Find the potential difference, Vba between points
Given that the radius of the O2- ion is about 140 pm in most oxides, calculate the radius of Mg2+, in pm. Your solution should include a sketch one face of the unit cell of MgO to show how the edge
Ramon has a coherent light source with wavelength 586 nm. What is the minimum width of the screen if Ramon wants to display three interference maxima
The binding energy of electrons to copper metal is 389.3 kJ/mol. What is the longest wavelength of light that will eject electrons from copper metal? Enter units.
A loop antenna of area A = 794.0 cm2 and resistance R = 4.000 ? is perpendicular to a uniform magnetic field B = 2.000 T. Find the total thermal energy dissipated in the loop
What is the wavelength in meters of the photon emitted when this highly excited hydrogen atom of hydrogen makes its transition from the n = 9 to the n = 8 state
Microwave ovens heat food by creating microwave electromagnetic radiation that is absorbed by water molecules in the food. Any material that does not have water in it will not absorb the radiation a
The two plates of a parallel plate capacitor are 5.8 mm apart and have a potential difference between the of 220 V. Find the magnitude of the electric field between the plates
Find the amount of heat involved when 300.4 g of propane is burned with an excess of oxygen. C3H8(g) + 3 O2(g) ? 3 CO2(g) + 4 H2O(l) -->?H = -2219 kJ