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We were given the answer as 6.3 x 10^8 cm^-3, but I have no idea where to begin on this as we weren't given a temperature so I can't calculate the intrinsic concentration.
If the distance from point A to point B is 0.50 m, what is the change in the proton's electric potential energy, EPEB - EPEA?
A skier leaves the ramp of a ski jump with a velocity of V=10 m/s at an angle of 15 (Degrees) above the horizontal. The slope where she will land is inclined downward at 50 (Degrees), and air resis
A certain metal oxide has the formula MO. When 39.46 grams of MO reacts with excess hydrogen gas according to the reaction shown below, 31.70 g of pure M is obtained.
A charge (uniform linear density = ?) lies on a string that is stretched along an x axis from x = 0 to x = L. Determine the magnitude of the electric field at a point x = d > L on the x axis. Exp
A 25 L container holds hydrogen gas at a guage pressure of .25 atm and a temperature of 0 C. What mass of hydrogen is in the container and how many molecules are there?
An object is at distance s from a thin glass lens of focal length f. The lens is surrounded by air. The image is at distance s' from the lens. Draw a graph of s' versus s. Explain physically why the
If a divalent metal ion is inserted in the center of theporphine ring, tis charge will exactly balance the two negative charges of the dianion.
Find the equivalent capacitance of three capacitors C(1) = 5.0 uF (micro F), C(2) = 10 uF (micro F), and C(3) = 12 uF (micro F), when they're in parallel.
How many milligrams of MgI2 must be added to 250.0 mL of 0.0876M KI to produce a solution with [I-]=0.1000 M? Note that this assumes no volume change upon addition, probably not abad assumpution for
An aluminum rod has a resistance of 1.234 4 at 20.0°C. The rod is cooled down to 20 C. And at that temperature it is stretched to twice its length at 20C. Find the new value of the resistance of
Fe + 2HCl = FeCl2 + H2 A piece of metallic iron (10 moles) was dissolved in concentrated hydrochloric acid. The reaction formed hydrogen gas and iron chloride. How many grams of HCl were consumed?
You have 750 g of water at 10.0 C in a large insulated beaker. How much boiling water at 100.0 degrees C must you add to this beaker so that the final temperature of the mixture will be 75 degrees C
The heat of fusion of ice, ΔH fusion,is = 6.01 kj/mol. What mass of ice can be meltedwith the same quantity of heat as required to raise the temperture of 3.50 mol H2O by 50.00 degrees C?
A closed vessel contains an inert gas A at 760 mmHg and60°C. What is the total pressure in millimeters of mercury inside the vessel after a few drops of liquid B are injected and aphase equilibr
A staff chemists attempts to prepare 3,3-dimethyl-1-butyne. Using the above chemicals, our chemist obtains tert-butyl chloride and acetylide ion, and then adds tert-butyl chloride to the solution o
Sodium flouride, NaF, is a basic salt. Write the chemical equation that describes how the salt breaks up into its ions. Write the chemical equation that describes how one of the ions behaves as abas
Draw the structures of the 4 branced,constitutional isomers of n-hexane and circle the ones that should be chiral ( that is draw circles around the structures that cannot be super-imposed on their m
Magnesium burns in air to produce a bright light and is often used in fire works displays. The combustion of magnesium follows the thermo chemical equation
A car approaches you at a constant speed while sounding its horn. You hear a frequency of 86.0 Hz. After the car goes by, you hear a frequency of 79.0 Hz. What is the frequency of the sound emittted
Fe2O3 + 2Al - 2Fe + Al2O3If you start with 50.0g of Iron (iii) oxide and 25.0 g ofaluminum in the above problem, what is the limiting reagent?
The normal boiling point for a solutionof n-hexane (C6H14, M = 86.18 g/mol) and n-octane (C8H18, M =114.23 g/mol) is T = 93.7 °C. The vapor pressures for these two compounds at this temperature
An aluminum rod is 37cm long at 35.1 degree celcius and has a mass of 522g. If 20400 J of energy is added to the rod by heat, what is the change in length of the rod?
What is the ratio of the conjugate base concentration to the acid concentration, that is, [B- ]/[HB] when the indicator switches to the acidic color?
The height of the cliff is 9.00 m and the speed with which the stones are thrown is 14.00 m/s. Write an algebraic expression for the displacement yup of the upward-moving stone and ydown for the dow