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They attach ropes and one pulls with a force of 576 N at an angle of 31? with respect to the direction in which the truck is headed, while the other car pulls with a force of 872 N at an angle of 24
A gas has a pressure of 4.68 atm when its volume is 2.16 L. If the temperature remains constant, what will the pressure be when the volume is changed to 1.03 L? Express the final pressure in torrs.
What are the lewis dot structures for Ca3N2m CHBr3?
A lipoprotein particle functions to A lipoprotein particle functions to
In a particular region of the earth's atmosphere, the electric field above the earth's surface has been measured to be 155 N/C downward at an altitude of 300 m and 172 N/C downward at an altitude of
If 3.0 Ml of distilled water is added to 2.0 ml of 0.35M CoCl2 solution, what is the concentration of the resulting solution?
Phosphoric acid can form mono-, di-, and triesters. Diesters of phosphoric acid are part of the backbone of RNA and DNA. Identify the condensed structural formula of the dimethyl ester of phosphoric
If you placed 2.5 g of NaCl in 6.0 kg of water, what would be the boiling point elevation?
A 779-kg car stopped at an intersection is rear-ended by a 1820-kg truck moving with a speed of 15.0 m/s. If the car was in neutral and its brakes were off, so that the collision is approximately el
Calculate the number of grams of the indicated solutes present in each of the following solution samples. How many grams are in 172 mL of 15.4 M NH3
How much ice must melt in order to cool the hot water down to this temperature?
The vapor pressure of pure water at this temperature is 0.3804 atm. Find the value of the van't Hoff factor {i} for magnesium chloride in this solution.
Water self ionizes to a small extent creating equal concentrations of hydronium and hydroxide ions. What is the molar concentration of these ions in water at 25oC?
A bucket filled with water has a mass of 23 kg and is attached to a rope, which in turn, is wound around a 0.050-m radius cylinder at the top of a well. What torque does the weight of water and buck
Calculate the solubility of potassium bromide at 23 degrees C. Assume that the solubility increases by an equal amount of each degree between 20-30 degrees C
At 55.0 ºC , what is the vapor pressure of a solution prepared by dissolving 65.4g of in 259g of water? The vapor pressure of water at 55.0 ºC is 118 mmHg. Assume complete dissociation of
It does not conduct electricity in either the solid or liquid state. Does (NH2)2CO form an ionic,a covalent or a molecular crystal?
What is the pH of a solution of 6.5 * 10^-9 mol of Ca(OH)2 in 10.0 L of water [ Ksp of Ca(OH)2 = 6.5 * 10^-6 ] ?
We are trying to predict if two different liquid substances will mix to form a solution. If heat of solution is positive what determines whether or not the liquids mix?
Benzene has a heat of vaporization of 30.72kJ/mol and a normal boiling point of 80.1 degrees C. At what temperature does benzene boil when the external pressure is 470 torr?
A 40.0 rock slides on a rough horizontal surface at 6.00 and eventually stops due to friction. The coefficient of kinetic friction between the rock and the surface is 0.300. What average thermal pow
What is the net redox reaction that occurs when Au comes into contact with acidic KMnO4
A mixture of CH4 and H2O is passed over a nickel catalyst at 100 degrees K. The emerging gas is collected in a 5.00-L flask is found to contain 8.62g of CO, 2.60 g of h2, 43.0 g of CH4, and 48.4 g
One kilogram of air is allowed to expand reversible in a container behind a piston in such a way that the temperature remains constant at 260°C
The throw and catch each occur 1m above the ground. what minimum speed will allow the ball to clear the roof? At what angle should the ball be tossed. (in picture at roof starts at 3m and the angle