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Calculate the molar concentration of chloride in the resulting solution if 50.0 mL of a 0.10 M solution of sodium chloride is mixed with 50.0 mL of 0.10 M magnesium chloride.
Why helium spectrum has only six lines? Does this mean that there are only 6 possible electronic transitions in helium? Explain why or why not?
Calculate the molarity of the sodium hydroxide solution if 32.96 mL of a NaOH solution are needed to tirate 25.00mL of 0.08121 M H2C2O4 to the end point.
Determine the exponential model for fly population, and use model to forecast how many flies commission must expect to catch in 2012 (t=4)
Calculate the molar mass of the acid if 24.92 mL of the NaOH solution from the previous question are needed to titrate 0.1932g of an unknown dipodic (n=2) acid.
The radius of the solenoid is to be 1.5 cm and length of 30.0 cm. Determine how many turns of wire are required and the minimum numbers of layers will this acquire?
A small glass bead has been charged to 2.2 nC? Determine the strength of the electric field 2.0 cm from the center of the bead?
Why is it important to rinse the wet pipet with small portions of the standard oxalic acid solution in the standardization of NaOH solution.
Determine the magnetic field strength which could you get within a 2.9 diameter solenoid wound with the wire as closely spaced as possible?
Calculate the molarity of NH3 in the solution if an aqueous solution contains 4.55%NH3 (ammonia) by mass. The density of the aqueous ammonia is 0.979 g/mL.
A jogger of 85 kg is heading due east at a speed of 2.2 m/s. A jogger of 55 kg is heading 40° north of east at a speed of 3.8 m/s. Determine the magnitude and direction of the sum of momentum of
When ammonia is formed using the Haber process in which hydrogen and nitrogen combine. N2(g) + 3H2(g) =>2NH3(g) determine the numbers of grams of nitrogen are required to form the 650 grams
Determine the pH of a solution that is 0.210 M in sodium acetate, NaC2H3O2 and 0.120 M in acetic acid , HC2H3O2 The Ka of acetic acid is 1.76 x 10-5.
Determine the numbers of grams of sodium acetate must be added to 100ml of0.150 M in sodium acetic acid in order to form a solution with a pH of 4.620?
At 4.2 K the Liquid helium has a density of 0.147 g/mL. Suppose that a 1.00-L metal bottle that contains air at 99K and 2.0 atm pressure is sealed off.
At 762.0 torr a mouse is placed in a sealed chamber with air. This chamber is equipped with the enough solid KOH to absorb any H2O and CO2 formed by the mouse.
Vaporization of 255.0 mg of the compound in a 160-mL bulb at190 degrees C gives a pressure of 435.0 torr. An analysis is performed on an organic liquid with a fishy odor. Calculate the molar
Determine how many electrons are emitted from the square centimeter of the surface each second? Suppose that the absorption of each and every photon emits an electron.
At 253.0 °C and 1.8 atm, 310.0 mL of the vapor has a mass of 1.252 g. Calculate the molar mass of the compound? Analysis of a volatile liquid shows that it contains 2.04 percent hydrogen, 24.79
Determine at what mass of potassium chlorate is needed to supply the proper amount of oxygen required to burn 71.06 g of methane (CH4)
You are playing ice hockey in a completely frictionless pond frozen pond? Determine how you can move yourself to the edge of the pond, since without friction you won’t be capable to push again
Measurements of argon gave C = 1200. cm6 mol-2 and B = -21.7 cm3mol-1 at 273 K where B and C are the second and third viral coefficients in the expansion of Z in powers of 1/Vm.
OHaganBooks.com's stock was doubling in value every 5 hours. If you purchased $10,000 worth of stock when it was first presented, how much was the stock worth after 8 hours?
The cue ball is deflected so that it makes the angle of 30.0 degrees with the original direction of travel. Determine (i) the angle between the velocity vectors of the two balls after the collision
Determine the equilibrium constant, Keq for the balanced chemical reaction given below. The initial concentrations of [H2] = 8.00, [NH3]= 0.00 and [N2] = 4.00; at equilibrium the concentration of