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Find the magnetic force on the electron. Hint: use -q instead of +q in the magnetic force equation and remember force is a vector.
Start with three carbons bound together (-c-c-c-). What individual atoms or functional groups could you add to the carbons to make the molecule hydrophobic?
If the partial pressure of NO is decreasing at the rate of 30 torr/min, what is the rate of change o f the total pressure in the container.
Calculate the mass of vapour present in a room of volume 250 meter cube that contains air at a temperature of 23 degree centigrade on a day when the relative humidity is 53%.
A thermodynamic study of DyCl3 determined its standard enthalpy of formation from the following information. Determine delta (subscript f) H for DyCl3 from the following reaction enthalpies.
An x-ray beam of a certain wavelength is incident on a crystal, at 31.3° to a certain family of reflecting planes of spacing 41.4 pm. If the reflection from those planes is of the first order, wha
Question: An electron moves in a 0.5nT B-Field. If the radius of the circular orbit is 1cm, what is its period, angular velocity, linear velocity, linear momentum, angular momentum and kinetic energ
Why are London Dispersion forces of the sample molecules strongly influencing GC measurements? And why are they usually negligible in TLC experiments on silica gel?
A particle enters a particle spectrometer. You are not sure of the charge or mass but you do know it banks right. You are not sure of the magnitude of the B-field, but that it does go into the page.
Metallic iron has a bcc structure at 20 C and a density of 7.8 g/cm3. What is the length of the side of the unit cell for iron and what is the atomic radius?
Markings to indicate length are placed on a steel tape in a room that is at a temperature of 22°C. Measurements are then made with the same tape on a day when the temperature is 27°C. Are th
The element rhenium (Re, atomic number 75) has two naturally occurring isotopes, Re-185 (mass = 184.935 amu) and Re-187 (mass = 186.956 amu). Calculate the percent abundances of the isotopes of r
What uniform magnetic field, applied perpendicular to a beam of electrons moving at 2.3 x 106 m/s, is required to make the electrons travel in a circular arc of radius 0.45 m?
The element bromine at room temperature is a liquid with a density of 3.12g/ml calculate the mass of 125 ml of Bromine. What volume does 85.0 g of bromine occupy?
Two toy locomotives approach each other along the same line, and upon collision both stop dead still. One locomotive has three times the speed of the other and the sum of their masses is 4.98 kg. A
What would be the vapor pressure at 25.0 °C of a solution of 5.00 g of glucose (C6H12O6) in 100.0 g of ethanol (C2H5OH)?
The current in a coil with a self-inductance of 1 mH is 3.0 A at t = 0, when the coil is shorted through a resistor. The total resistance of the coil plus the resistor is 9.0 Ohms. (a) Find the curr
A rock is tossed off the top of a cliff of height 34.5m. its initial speed is 29.1m/s and the launch angle is 30.2degrees with respect to the horizontal. what is the speed with which the rock hits t
A sample of solid having a density of 3.43 g/cm3 had an apparent mass of 13.9264. The density of the balance weights is 8.00 g/cm3. Calculate the true mass of the object.
Describe in detail how you would prepare a solution with a concentration near 0.100 M from a 0.650 M stock solution. Calculate the final concentration of the diluted solution (it won't be exactly
How much concentrated solution would you take to prepare 2.85 of 0.570 by mixing with water? HCl is purchased in 37% mass and has a density of 1.20 g/mL.
A student in a parked car honks the horn, which has a `proper' frequency of 310 Hz. An observer in an approaching vehicle measures the frequency of the sound to be 333 Hz. Calculate the speed of the
A block mass 15.92kg supported by a vertical massless cable is initially at rest. The block is then pulled upward with a constant acceleration of 2.11m/s^2. What is the net force acting on the mass?
If 50.0 grams of iron(III) oxide were mixed with 50.0 grams of aluminum, what maximum mass of iron metal could be produced?
An electric motor rotating a workshop grinding wheel at a rate of 9.70 101 rev/min is switched off. Assume the wheel has a constant negative angular acceleration of magnitude 1.60 rad/s2.