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two singly charged ions moving perpendicular to a uniform magnetic field B=0.4T each has a speed of 500 km/s, calculate the difference in masses of the two ions
What is the percent-yield of H2 in the reaction below when an equimolar mixture of CH4 and CO2 with an initial total pressure of 20.0 atm reaches equilibrium at 1200. K, at which Kp = 3.548 x 106
A resistance thermometer using a platinum wire is used to measure the temperature of a liquid. The resistance of is 2.42ohms at 0 degrees, calculate the temperature of the liquid
A chilled carbonated beverage is opened and allowed to warm to room temperature. Will the pH change, and if so, how will it change. loss of CO2 from the beverage (Henry's Law) will result i
A sample of 40.0 ml of a .1 M acetic acid solution is titrated with .150 molar sodium hydroxide Ka for acetic acid is 1.8 x 10^-5. What is pH of solution at equivalence point
At 745K, the reaction 2AB(g) ? A2(g) + B2(g) has a Kc = 2.00 x 10-2. If a mixture of 1.00 mol AB and 1.00 mol A2 is sealed into a 10.0 L flask and heated to 745K, what will be the equilibrium concen
A tuning fork has a frequency of 128 Hz, what is the period of the tuning fork
The solubility of benzoic acid at 0oC is 1.7g/L and at 90oC is 45.5g/L. How much water do you need to dissolve 0.455 g of benzoic acid at 90oC. How much of the original benzoic acid will remain in t
Complete and balance the following equation Write the ionic equation and net ionic equation. Indicate spectator ions and determine if a precipatie would form. (NH4)2C03(aq)+CaCl2
Phenolphthalein is added, and the solution remains colorless because of the excess acid that has not been neutralized. the solution is tirtared with 9.7 mL of 0.09 M NaOH to a faint pink endpoint
The burning of a piece of paper in air (to produce CO2 and H2O vapor) is a spontanous reaction exothermic reaction. What would be necessary to start this reaction
Use the force or spring constant from part (a), compute the potential energy stored in the spring when the spring is displaced 2.40 cm
If the molarity of stomach acid is 0.1 M (assumed to be HCl), how many grams of stomach acid will be "consumed" (i.e; neutralized) per gram of the antacid Ca(OH)2. Assume the denisty of stomach acid
generator has a terminal voltage of 115 V when it delivers 18.0 A, alculate the emf (e m f) and the internal resistance (r) of the generator
A beaker contains 250 mL of .0150 M silver ion. To this beaker is added 250 mL of .300 M bromide ion. What is the concentration of Ag+ in the final solution. Ksp for AgBr = 5.0 x 10^-13
What is the phase constant of the motion and what are its position and direction of travel at t = 2.00 s, what is the first time when the object is at maximum velocity?
An automobile battery has an emf of 12.2 V and an internal resistance of 0.088 omegacap.gif. What is the potential difference across the headlight bulbs when they are the only load on the battery
How many grams of .49% wt% aqueous HF are required to provide a 25% excess to react with 25 mL of .023 M Th^4+ by the reaction Th^4+ + 4F^- --> ThF4
as you get closer, you notice that it is GODZILLA!! and he sees you! and begins to come after you!! if you are now moving away at 15 m/s, what is the new frequency you detect from GODZILLA
A certain second-order reaction ( B--> product) has a rate constant of 1.50×10?3 M-1*S-1 at 27C and an initial half-life of 214s. What is the concentration of the reactant B after one half-
What is the heat energy change for this in kcal. Specific heat of h2o 1.00cal/gC. How many mols of cacl2 is this. How much heat energy per mol. answer in kilocalories
Then 2.00 mL of solution containing 0.0156 M dopamine was mixed with 90.0 mL of unknown, and the mixture was diluted to 100.0 mL in volumetric flask. The signal from the new solution was 58.4 nA. Wh
If you mix 2.5g of 100 degree celcius steam with 60g of 0 degree celcius ice. what percentage of the ice remains solid
A mixture containing 80.0 nM iodoacetone (designated A) and 64.0 nM p-dichlorobenzene (designated B) gave the relative detector response (peak area of A)/(peak area of B) = 0.71 in a chromatography
A person is standing 8 m away from a speaker and experiences an intensity level consistent with the standard pain threshold. what is the power of the speaker