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Calculate the molar concentration of oxygen in water at 25 celsius for a partial pressure of 0.22 atm. the henry's law constant for oxygen is1.3 *10 to -3 mol/L*atm
Determine the input that produces the largest or smallest output (whichever is apporpriate). State whether the output is largest or smallest. Complete the square where required.
The LED will only light up if enough electrical current is flowing through it. The amount of current is given by I = V/R, where V is the potential difference. Why does it only light up when it is po
Graph the quadratic equation. Specify the vertex, axis of symmetry, max or min value, and intercepts. Complete the square where needed.
What is the total magnitude of the magnetic flux ( Phi_initial) through the coil before it is rotated?
If the sample was heated to constant weight afterreheating, what is the minimum mass that the sample can have afterthe second weighing? Show how you determined your answer
A 60.0-O resistor is connected in parallel with a 120.0-O resistor. This parallel group is connected in series with a 20.0-O resistor. The total combination is connected across a 15.0-V battery. Fin
You have to prepare a pH 3.50 buffer, and you have the following 0.10 M solutions available: HCOOH, CH3COOH,H3PO4, HCOONa, CH3COONa, and NaH2PO4.
Find (a) the angle between the direction of motion of the second ball and the original direction of motion of the cue ball and (b) the original speed of the cue ball.
What do you expect for the sign of ΔS in a chemical reaction in which two moles of gaseous reactants are converted to three moles of gaseous products?
What is the magnitude of the frictional torque that must be exerted by the axle if the system is to be in static equilibrium? (Answer should be in N m)
Which compound would youexpect to elute first from the column: unreacted ferrocene,acetylferrocene or diacetylferrocene? why?
A tropical fish aquarium with 5 ocean species of fish has flat glass sides. A beam of light from outside the aquarium strikes the glass at a 47.0º angle to the perpendicular. What is the angle
Gold can behammered into extremely thin sheets called gold leaf. If a 200-mgpiece of gold (density 19.32g/cm^3) is hammered into a sheet measuring 2.4x1.0ft, what is the average thickness of the she
A concrete block with a specific weight of 23.6 kN/m3 is suspended by a rope in a solution with a specific gravity of 0.8. What is the volume in m3 of the concrete block if the tension in the rope is
The mass of a pendulum bob is .375 Kg. The length of a pendulum is 800 mm. If the bob is released at 20.0º to the vertical: What is the total energy stored in the oscillation, assuming no losses?
If it takes 42 minutes for the concentration of a reactant in a first order reaction to drop from .45 M to .32 M at 25 degrees C, How long will it take for the reaction to be 90% complete?
Using Faraday's Law of Induction, calculate the magnitude of the potential difference induced in the moving rod.
How can you tell the charge on an element/atom? Do you referto the periodic table? Is there some general rules?
EDTA is an organic acid. It is widely used in anaylyzing the hardness (i.e. amount of calcium and magnesium ions) of water. The structure of EDTA. Each molecule of EDTA can react with four molecules
For the reaction at 25 degrees C, 2NO2(g)<----> N2O4(g), the values of delta H and delta S are -58.03 Kj/mol and -176.6 J/K mo, respectively.
A 65.0 g sample of zinc ( specific heat = 0.0922 cal/g X degrees C) was cooled from 100.0 degrees C to 29.4 degrees C in calorimeter cup containing water initially at 21.5 degrees C. Find the mass o
Math, hello. there are 4 easy task.i need solutions on world document............................................................
A student titrates 5.00 mL of formic acid with 26.59 mL of 0.1088 M NaOH. At this point the indicator just turns pink. Calculate the concentration of the formic acid.
Calculate the mass of a piece of copper that released 125 calories when cooled from 100.0 degrees celsius to 25.3 degrees celsius. the specific heat of copper is 0.00924 cal/g X degrees celsius.