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The calcium ion from the resulting solution, an excess of potassium oxalate was added. The precipitate of calcium oxalate, CaC2O4, weighed 1.437 g. What was the molarity of CaCl2 in the solution?
The barrel has a length of 0.60 m and an opening whose radius is 2.8 10-3 m. A bullet (mass = 2.7 10-3 kg) has a speed of 380 m/s after passing through this barrel. Ignore friction and determine the
For instance, we have an isolated spherical capacitor on an insulating rod with a conducting base. Why do you get the most accurate vale for capacitance when applying a guard voltage to the base and
How many milliliters of a 2.34M solution of glucose, C6H12O6, molar mass = 180.155 g/mol, do you need to obtain 25.0 g of glucose?
A gas mixture with a total pressure of 760mmHg contains each of the following gases at the indicated partial pressures: CO2. What is the partial pressure of the helium gas?
A car was seen driving off the edge of a cliff at an angle of 10.° above the horizontal. The cliff is 95. m high and the car impacted the ground at a distance of 156. m from the base of the cli
What is the sum of the stoichiometric coe?cients in the balanced equation? Do not forget to add the coe?cients that are 1.
Clifford is in a real hurry, however, and skips the speedramp. Starting from rest with an acceleration of 0.39 m/s2, he covers the same distance as the ramp does, but in one-fourth the time. What is
A small piece of dust of mass m = 1.4 g travels horizontally through an electric air cleaner in which the electric field is 495 N/C. The electric force on the particle is equal to the weight of the
A 2.77 L flask is filled with carbon monoxide at 27 °C until the pressure is 7.79 atm. Calculate the total pressure after 1.73 moles of carbon dioxide has been added to the flask. (R=0.082 L-atm
A model rocket is lauched straight upward with an initial speed of 80.0 m/s. it accelerates with a constant acceleration of 2.00 m/s^2 until its engines stop at an attitude of 200 m. the rocket cont
What is the potencial energy of an elevator with a mass of 8.00x 10^2 kg at the top of manila hotel, 3.80 m. above the street level?
When 5.00 g of X is titrated with NaOH, it is found that X has two acidic hydrogens that react with NaOH and that 54.9 mL of 1.00 MNaOH is required to completely neutralize the sample. What is the m
A 34.0 g sample of nitrogen gas reacts with an excess of hydrogen gas to give an actual yield of 4.75 g NH3. What is the percent yield for this reaction? Reaction: N2(g) + 3 H2(g) ? 2 NH3(g).
An object is found to move with an acceleration of magnitude 8 m/s2 when it is subjected to a force of magnitude 222 N. Find the mass of the object.
How much SO3 can be produced from 96.0 g of O2 and excess sulfur if the yield is 84.5%?
An athlete at the gym holds a 1.2 kg steel ball in his hand. His arm is 64 cm long and has a mass of 4.0 kg. What is the magnitude of the torque about his shoulder if he holds his arm straight, but
Using Heisenberg's uncertainty principle, calculate the uncertainty in the position of: a 1.50-mg mosquito moving at a speed of 1.40 m/s if the speed is known to within a + or - 0.01 m/s.
The vertical component of this force is 128 newtons, while the horizontal component is 145 newtons. Calculate the magnitude of F.
When the galvanometer in a wheatstone bridge circuit shows no deflection, why are the voltages across opposite branches on each side of the galvanometer necessarily equal?
A thin stick of mass M = 4.3 kg and length L = 1.4 m is hinged at the top. A piece of clay, mass m = 0.5 kg and velocity V = 0.8 m/s hits the stick a distance x = 0.75 m from the hinge and sticks t
2,3,6-tri-O-methyl-D-glucose, 2,4-di-O-methyl-D-glucose and 2,3,4,6-tetra-O-methyl-D-glucose. The ratio of these sugars was 20:1:1. What is the structure of the polysaccharide?
How much heat is released when 40.0 g of steam at 250.0oC cools and condenses to water at 30.0oC?
A grocery cart with a mass of 13 kg is being pushed at a constant speed up a flat 16 degree ramp by a force Fp which acts at an angle of 17 degrees below the horizontal. Find the work done by the: (
In a beaker100 mL of 0.10 M HCl is added to 50 mL of 0.40 M KOH. Calculate the final concentration of OH- in solution after the reaction goes to completion.