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Calculate the pH for each of the following cases in the titration of 50.0 mL of 0.210 M HClO(aq) with 0.210 M KOH(aq).
Three equal point charges, each with charge 1.30 mu C, are placed at the vertices of an equilateral triangle whose sides are of length 0.600 m. What is the electric potential energy U of the system?
A chemical reaction takes place in a container of cross-sectional area 50.0 cm2. As a result of the reaction, a piston is pushed out through 15 cm against an external pressure of 121 kPa. Calculate
A 14.045 g aliquot of this solution is then titrated with 0.1043 M HCl. It required 29.18 mL of the HCl solution to reach the methyl red endpoint. Calculate the weight percent NH3 in the aqueous was
A 260 g block on a 54cm -long string swings in a circle on a horizontal, frictionless table at 90 rpm. What is the speed of the block? What is the tension in the string?
A paperweight, when weighed in air, has a weight of W = 7.4 N. When completely immersed in water, however, it has a weight of Win water = 4.4 N. Find the volume of the paperweight.
A positive cell potential indicated that the chemical reaction in the cell can be used to generate electrical work. Can this reaction be used to generate work?
An 9.00kg ball, hanging from the ceiling by a light wire 140cm long, is struck in an elastic collision by a 1.80 ball moving horizontally at 6.50 m/s just before the collision. Find the tension in
A string under a tension of 76 N is used to whirl a rock in a horizontal circle of radius 3.8 m at a speed of 21.84 m/s. The string is pulled in, and the speed of the rock increases. When the strin
A solid cylinder with a radius of 4.0 {rm cm} has the same mass as a solid sphere of radius R. If the cylinder and sphere have the same moment of inertia about their centers, what is the sphere's ra
what is the % composition of KHP in the impure sample? (Assume all impurities in the KHP sample do not participate in acid/base chemistry)
A grindstone of a radius 4.0 m is intially spinning with a radius of 8 rad/s. The angular speed is then increased to 12 rad/s over the next 4.0 seconds. Assume that the angular acceleration is cons
Its vapor took 1.77 times as long to effuse as the same amount of CO2 under the same conditions of temperature and pressure. What is the molar mass of the phosphorus chloride?
When people are in a crowd, the likelihood of them helping another person is lessened due to a decrease in feelings of personal responsibility to act because others are present. This phenomenon is
When nylon forms, adipic acid (a diacid) reacts with 1,6-diaminohexane to eliminate a water molecule and form the polymer. What type of polymerization is this and why?
Rosie (mass 56 kg) pushes a box with a horizontal force of 110 N 924. 728 lb) at a speed 17 m/min. What is Rosie's power input? Answer in units of W.
Find the tension in the strap, given that the suitcase moves with constant speed and that the coefficient of kinetic friction between the suitcase and the floor is 0.40.
Calculate the number of moles of aluminum atoms that will react with 2.46 mol copper chloride according to the equation 2Al(s)+3CuCl2(aq)->2AlCl3(aq)+3Cu(s)
How many grams of CaH2 are needed to generate 145 L of hydrogen gas if the pressure of H2 is 825 mm Hg at 21.0°C?
how many grams of glucose must be dissolved in 563 grams of ethanol to prepare a 2.40x10-2 m solution?
A hot 70 C lump of metal has a mass of 250g and a specific heat of 1.05 J/gC. the metal is dropped into a 500g calorimeter containing 75 g of water at 20 C the calorimeter has its own specific heat
Two charges separated by one meter exert 1-N forces on each other. If the charges are pulled to a 3-m separation distance what will the force on each charge be?
Estimate the number of electrons present in a (neutral) 1.0 block of carbon.
What is the energy in joules of a mole of photons associated with red light of wavelength 7.00 ´ 102 nm (c = 3.0 x 108m/s; h = 6.63 x 10-34 J s; nA = 6.022 x 1023/mole)?
A piece of metal weighs 50.0 n in air, 36.0 in water, and 41.0 in an unknown liquid. Find the densities of the metal and the inknown liquid