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A 0.036 M aqueous nitrous acid(HNO2) solution has an osmotic pressure of 0.92 atm at 26°C.Calculate the percent ionization of the acid.
A 9.0 kg hanging weight is connected by a string over a pulley to a 5.0 kg block sliding on a flat table. If the coefficient of sliding friction is 0.20, find the tension in the string.
When 2.50grams of copper(Cu) reacts with oxygen, the copper oxide product has a mass of 2.81grams. what is the simplest formula of the copper oxide?
A 0.54·kg mass vibrates according to the equation x = 0.43 cos (8.44t + 2.91), where x is in meters, and t is in seconds. (a) Determine the amplitude (b) Determine the frequency. (c) Determine
Molarity of standard potassium bromate solution =0.006611Molarity of sodium thiosulfate solution = 0.015810.2761 grams of vitamin C is titrated with 62.34 mL of potassium bromate and 63.58 mL of so
A force F1 of magnitude 5.40 units acts at the origin in a direction 28.0° above the positive x axis. A second force F2 of magnitude 5.00 units acts at the origin in the direction of the positiv
Suppose that 4.5 L of methan at a pressure of 754 Torr is transferred to a vessel of volume 2.4 L. What is the final pressure of methane if the change occurs at constant temperature?
A wedge of glass increases in thickness with an angle of 2 mrad. Green light (wavelength 530 nm) illuminates the upper surface of the wedge at normal incidence.
The value of k at the temperature at which the experiment was performed is 2.2 x 10-5 s-1. How many moles of the reactant were originally present in the apparatus, which has a volume of 350 mL?
The edges of a cube consist of equal resistors of resistance R, which are joined at the corners. Let a battery be connected to two opposite corners of a face of the cube. What is the efective resist
A 150 N sled is pulled up a 28o slope at a constant speed by a firce of 100 N. What is the coefficient of kinetic friction between sled and slope?
0.5054 grams of soda ash was diluted with 25 mL of water. It was titrated with 90.51 mL of 0.08042M HCl.Calculate the moles and hence mass of sodium carbonate in thesoda ash.
Consider light that is refracted by a prism shaped like an equilateral triangle. The incident ray is parallel with the prism's base. What is the total deflection of the ray, given that the index of
What mass of Mg(OH)2 will be formed when 30.0mL of .200M MgCl2 solution is mixed with 25.0mL of 0.420 MNAOH solution?What will be the molar concentrations of the ions remaining insolution?
A 2.0µF capacitor and a 4.0µF capacitor are connected in series across 1000 V. The charged capacitors are then disconnected from the source and connected to each other with terminals of
What are specific reactions that take place in a catalytic converters? What shapes of catalytic converters are common?
Two parallel metal plates have area A = 255 cm2 and are separated by l = 0.50cm. They have a potential difference of 0.25 V. Find the numerical value of the electric field. What are the charge densi
A horizontal force of 750 N is needed to overcome the force of static friction between a level floor and a 250 kg crate. If g = 9.8 m/s2, what is the coefficient of static friction?
For a given sample of CH3OH, the enthalpy change on reaction is25.8kj. how many grams of hydrogen gas are produced? what is the value of delta H for the reverse of the previous reaction?
A 20 kg traffic light hangs midway on a cable between two poles 40 meters apart. If the sag in the in the cable is 0.40 meters, what is the tension in each side of the cable?
A sled weighs 100 N. It is held in place on a frictionless 200 slope by a rope attached to a stake at the top; the rope is parallel to the slope. Find the tension in the rope.
Attached to the 8 kg mass is another light string, which a person uses to to pull both blocks horizontally. If the two block system accelerates at 0.50 m/s2 what is the tension in the connecting str
68.9257 amu is the mass of 60.4% of the atoms of an element with only two naturally occurring isotopes. the atomic mass of the other isotope is 70.9249 amu. Determine the atomic weight of the eleme
What is the total charge of the protons that must be fired at the tumor to deposit the required energy?
A sample of mettallic element X, weighting 3.177g, combines with 0.6015 L of O2 gas ( at normal pressure and 20.0 C) to form the metal oxide with the formula XO. If the density of O2 gas under these