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Calculate the pH at the equivalence point in the titration of 50 mL of .10M methylamine with a 2.0M HCL solution.
What is the y-component of the magnetic force on the first particle due to the second?
A Rolaids tablet contains calcium carbonate to neutralize stomach acid. If 44.55 mL of 0.448 M hydrochloric acid is required to neutralize one tablet, how many milligrams of calcium carbonate are in
When the magnetic flux through a single loop of wire increases by 30 tm^2, an average current of 40A is induced in the wire. Assuming that the wire has a resistance of 2.5 Ohms a(a) over what period
Two workers hold a heavy pail. Its mass is unknown. One worker exerts a 220N force at 137 degrees from vertical. The other worker exerts a 170N force. What is the weight of the pail?
Kucharel is a polymer that is prepared by heating the dimethylester derived from cyclohexane-1, 4-dicarboxylic acid with ehyleneglycol. What is the repeating unit in Kucharel?
On the return trip it flies with the tailwind and has an effective ground speed of 124 mi/h. Find the speed p of the plane in still air, and the speed w of the wind.
What is the work done on the gas if it is compressed at constant pressure to one-quarter its initial volume?
Show that this can be done two different ways and find the exact dimensions of the box in each case (note, one of your answers may have dimensions that will require you to approximate).
Calculate (a).the molar concentration of the ammonia solution and (b). convert to percent by mass concentration of ammonia (17.0 amu), given asolution density.
Find the amount of time it takes for the target mass (m = 1kg) to raise its temperature by 100K if the current of the beam is I = 20µA. Note that the specific heat of iron is c = 500J/kg K, an
Determine the equation of both parabolas that pass through the three points. Graphically display the results an axes.
Experiments show that it takes 1656 kJ/mol to break all the boundsin methane ( CH4) and 4006 KJ/mol to break all the bonds in propane(C3H8) .Based on these data , calculate the average bound enthalp
A block is released from rest when the spring is stretched a distance d. If k = 50 N/m, m = 0.50 kg, d = 10 cm, and the coefficient of kinetic friction between the block and the horizontal surface i
Find the area of the triangle enclosed by the graph of f(x), the x-axis and the y-axis. express your answer in terms of just b.
A cart of mass 2.3 kg is moving with a velocity of 15.2 m/s. It makes a head-on perfectly inelastic collision with a stationary cart B with mass 8.1 kg causing them to travel with a velocity 10.94 m
A rancher has 12 milesof fenching to fence a rectangular pieve of grazinglang along a straight river. Find the dimensions of the rectangle that has the largest possible area.
Clothing has a static coefficient of friction against steel in the range 0.60 to 1.0 and a kinetic coefficient in the range 0.40 to 0.70. What is the minimum rotational frequency in rpm, for which t
Find end the domain and range of x and express in interval notation and find all values of x at which the graph of f(x) is discontinuous.
Suppose a patient is given 155 mg of I-131, a beta emitter with a half life of 8.0 days. Assuming that none of the I-131 is eliminated from the person's body in the first 4.0 hours of treatment, wha
An astronaunt of mass 67.3 kg is on a space walk to repair a communications satellite. Suddenly she needs to consult her physics book so you throw it to her with speed 7.1 m/s relative to your space
A 4.78-g sample of aluminum completely reacts with oxygen to form 6.67 g of aluminum oxide. Use this data to calculate the mass percent composition of aluminum in aluminum oxide.
An electron moves in a circular path perpendicular to a constant magnetic field with a magnitude of 2.50 mT. The angular momentum of the electron about the center of the circle is 3.00 x 10-25 J&mid
The rock in a particular iron ore deposit contains 83 %Fe2O3 by mass. How many kilograms of the rock must be processed to obtain 1300 kg of iron?
Fingernail-polish remover is primarily acetone(C3H6O). How many acetone molecules are in abottle of acetone with a volume of 405 mL? (density of acetone =0.788 g/cm3 ).