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After completing th calculations below, sketch the PH curve for the titration of 30.0 mL of a 0.125M solution of a weak acid, HA(ka=1.3*10^-5) with 0.125 M KOH. indicate the pH at a) the beginning
Four charges of equal magnitude Q = 65 nC are placed on the corners of a rectangle of sides D1 = 25 cm and D2 = 10 cm. calculate the numeric value for the horizontal force in N
If the surface area of a human is 1.7 m^2 and each square inch of skin contains 75 pressure sensors
7.80 g of CuNO3 is dissolved in water to make a 0.720 M solution. What is the volume of the solution? Answer should be in mL.
After having collected samples along the shore all day long, a marine biologist walks back to her campsite, 1.69 km away. What distance did the dog run
A) a saturated solution of metal hydroxide, M(OH)2, has a pH of 10.35. Calculate the molar solubility and the ksp, for this metal hydroxide? M(OH)2(s)<<<<>>>M^2+2OH1- B) What is
The catapults on the USS George H.W. Bush can launch aircraft from rest to a speed of 150 mph over a distance of 270 feet. Find the acceleration of the aircraft
A 1.90-cm-high object is situated 19.2 cm in front of a concave mirror that has a radius of curvature of 11.1 cm. Calculate the location and the height of the image
Calculate the vapor pressure of Hg at 86 oC (in atm). Hg(l) ? Hg(g) ?Ho = 61.32 kJ and ?So = 98.83 J/K
A time-dependent force, Fvecbold = (7.50i hat bold ? 4.05tj hat bold), How far is the object from its initial position when its speed is 15.0 m/s
Your are sitting in your car, which is standing at the side of the road with the engine idling. After what distance will you catch up with your classmate
2-chloro-butane is obtained when 1-butene and 2-butene react with HCl. Which has the greater free energy of activation and why
A car driving at 33 m/s is approaching a stoplight. As the stoplight turns red, the driver decides that the car is going too fast to stop at the white line and hits the brakes hard. How fast was the
What is the pH of a solution made by adding 10.5 grams of sodium acetate, CH3COONa to 400 mL of 0.180 M hydrochloric acid.
The "reaction time" of the average automobile driver is about 0.7s. Compute the total distance covered in coming to a stop after a signal is observed from an initial velocity of 12.0
A thin plate of copper is suspended in seawater. If the corrosion rate is 0.4 mpy (mils per year) and the plate is a square of dimension 4.0 in. per side, how much weight loss (in mg) is expected in
Find the electric energy density between the plates of a 225-?F parallel-plate capacitor. The potential difference between the plates is 350V
You are playing raquetball at the rec center. When you are 10 m away from the wall you hit a ball 26m/s towards the wall at an angle of 30 degrees. How long is the ball in the air before it hits the
A cubic box with sides of 20 cm is closed and sealed in Tucson where the atmospheric pressure is 90 mbar. It is driven to the top of Mount Lemmon where the pressure is reduced to 745 mbar. What is t
Suppose that you want to find the equation for a line that passes through the two points (0,3) and (4,9). What is the slope of this line
Brain injuries in auto accidents. Brain injuries generally occur any time the brain's acceleration reaches 100 g for even a short time. Find the maximum speed with which the car can strike the barrie
An electric field is E = 400 N/C i for x > 0 and E = -400 N/C i for x < 0. A cylinder of length 20 cm, What is the outward flux through each end
sodium hydroxide is extremely soluble in water. At a certain temperature, a saturated solution contains 551g of NaOH (s) per liter of solution. Calculate the molarity of this saturated NaOH (aq) sol
A jet airliner, moving initially at 330 mi/h to the east, suddenly enters a region where the wind is blowing at 100 mi/h toward the direction 30.0° north of east
In a football game a kicker attempts a field goal. The ball remains in contact with the kicker's foot for 0.0437 s, determine the vertical components of the launch velocity