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The dipole moment (mu) of HBr (a polar covalent molecule) is 0.790 D (debye), and its percent ionic character is 11.7%. Estimate the bond length of the {H-Br} bond in picometers.
Find the angle of the slope that a person will slide down at a constant speed once he has started moving if the coefficient of sliding friction is .425
calculate the concentration of solution if 45% aqueous calcium chloride whose density is 1.10 g/ml. formula weight of calcium chloride= 110 g.mole
What is the time necessary for crossing if the hunter wishes to move neither upstream nor downstream whilst crossing the river? Draw the vectors to scale on a graph to determine the answer.
A shopper walks from the door of the mall to her car 250 m down the line of cars, then turns 90 degrees to the right and walks an additional 60 meters. What is the magnitude of the displacement of
It is desired to inflate a baggie with a volume of 842 milliliters by filling it with oxygen gas at a pressure of 1.21 atm and a temperature of 306 K. How many grams of O2 gas are needed?
A 30.1-g sample of Ne gas exerts a certain pressure in a container of fixed volume. What mass of Ar is required to exert half the pressure at the same conditions of volume and temperature?
A car drives north at 46mi/h for 10min and then turns east and goes 5.0mi at 56mi/h . Finally, it goes southwest at 30mi/h for 6.0min. What's the car's displacement?
An astronaut who was outside repairing his spaceship with a wrench lost his tie rope. Now he is stranded in space. Unfortunately, you can't swim in space. How can the law of conservation of mome
75.0 mL of a 1.40 M solution is diluted to a total volume of 278 mL. A 139-mL portion of that solution is diluted by adding 117 mL of water. What is the final concentration? Assume the volumes are a
The excess acid then requires 30.10 mL of 0.1220 M NaOH for complete neutralization. Calculate the % Na2CO3 (MM = 105.99 g/mol) in the sample.
In the figure below (part a), two blocks are connected by a lightweight, flexible cord which passes over a frictionless pulley. (a) If m1 = 2.8 kg and m2 = 5.2 kg, what is the acceleration of the t
The mixture was then heated and held at boiling for 45 minutes. 0.2533 g of the precipitate, barium sulfate, was filtered off, washed and dried. Determine the identity of the halogen, X.
If a third charge, of 5.00 , is now placed at the point = 3.00 , = 4.00 find the and components of the total force exerted on this charge by the other two charges.
The pressure exerted by a gas is 2.0 atm while it has a volume of 350 cm3. What would be the volume of this sample of gas at standard atmospheric pressure?
A dog searching for a bone walks 3.00 m south, then 8.20 m at an angle 30.0° north of east, and finally 14.0 m west. Find the dog's resultant displacement vector using graphical techniques.
A sample of a diatomic gas occupies a volume of 2.35 L at a pressure of 0.979 atm and a temp of 26.4 C. Calculate the molecular weight and determine the identity of the gas if the gas sample weighs
In a car lift the output plunger has a radius of 9 cm. The weight of the plunger and the car is 21,600N. What is the gauge pressure of the hydraulic oil used in the operating the lift?
A sample of gas under a pressure of 622 kPa has a volume of 233 cm3. The pressure is increased to 988 kPa, while the temperature remains constant. What volume will the gas occupy at this pressure?
The wind exerts a force of 153 N North on a sailboat, while the water exerts a force of 81 N West on the sailboat. What is the magnitude of the net external force on the sailboat?
What is the angular velocity in rad/s? What is the angular displacement of the propeller in 1.50 s?
A 100 mL sample of a 6.0 mol/L solution of H2SO4 is diluted to a final volume of 500 mL. What is the concentration of the diluted solution?
What is the pH of 1.00L of the buffer solution that contains 0.100 M HF and 0.120 M NaF after 0.020 of HNO3 is added? The Ka of HF is 3.5 x 10-4, and so pKa = 3.46.
Argon is a monatomic gas whose atomic mass is 39.9 u. The temperature of 9 grams of argon is raised by 75 K under conditions of constant pressure. Assuming that argon is an ideal gas, how much heat