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What is the molarity of a solution of 14.0 NH4Br in enough H20 to make 150 mL of solution
Calculate the formation change CaF2(The sublimation energy for is +178.2, = +589.8, = +1145, and the lattice energy of is 2630 .)
The first-order bright fringe is a distance of 4.84 from the center of the central bright fringe. For what wavelength of light will the first-order dark fringe be observed at this same point on the
A 28.0-g sample of water at 260. K is mixed with 51.0 g water at 310. K. Calculate the final temperature of the mixture assuming no heat loss to the surroundings
A proton in a linear accelerator has a de Broglie wavelength of 127 pm. What is the speed of the proton?
The two surfaces on which the bottle rests are 90.0° apart, and the right surface makes an angle of 45.0° with respect to the horizontal. Each surface exerts a force on the bottle that is pe
A standard solution of 0.154 M HCl is used to determine the concentration of a NaOH solution whose concentration is unknown. If 33.5 mL of the acid solution are required to neutralize 25.0 mL of th
A volume of saline solution weighted 26.5g at 4 degrees Celsius. The same volume of water at 4 degrees Celsius weighed 25.4g. What is the density of the saline solution?
If the 58-N backpack in Figure 6-22 of the text begins to slide when the spring (k=105 N/m) stretches by 1.2 cm, what is the coefficient of static friction between the backpack and the table?
what is the pH of the mixture when 25 mL of 0.200 M KOH has been added to 25.00 mL of 0.200 M acetic acid
A box is sliding up an incline that makes an angle of 11.8 ° with respect to the horizontal. The coefficient of kinetic friction between the box and the surface of the incline is 0.147. The init
How do the unshared pairs of electrons in water and nitrogen, affect the bond angles between the central atom and the attached atoms
A 56.7 kg spacewalking astronaut pushes off a 653.0 kg satellite, exerting a 199.0 N force for the 0.184 s it takes him to straighten his arms. How far apart are the astronaut and the satellite afte
The buffer from Part A is diluted to 1.00 rm L. To half of it (500. rm mL), you add 0.0250 mol of hydrogen ions without changing the volume. What is the rm pH of the final solution?
A bird that can fly 60 km/h flies off the front of one train when they are 60 km apart and heads directly for the other train. On reaching the other train it flies directly back to the first train,
A ball on a porch rolls 60 cm to the porch's edge, drops 40 cm, continues rolling on the grass, and eventually stops 80 cm from the porch's edge. What is the magnitude of the ball's total displaceme
A conical pendulum consists of a bob of mass m in motion in a circular path in a horizontal plane as shown in the figure below. During the motion the supporting wire of length l maintains the consta
The rocket engine provides constant upward acceleration during the burn phase. At the instant of engine burnout, the rocket has risen to 59 m and acquired a velocity of 10.0m/s. The rocket continues
How much time will it take for the police officer to catch up to the speeder, assuming that the speeder maintains a constant speed? How fast will the police officer be traveling at this time?
The north wall has an area of 15 m2, the east wall has an area of 12 m2, and the floor's area is 35 m2. At the site the Earth's magnetic field has a value of 0.60 G and is directed 50° below the
A reaction mixture at 175 initially contains 522 torr of NO and 421 torr of O2. At equilibrium, the total pressure in the reaction mixture is 748 torr. Calculate Kp at this temperature.
A long current carrying solenoid with an air core has 1750 turns per meter of length and a radius of 0.0180 m. A coil of 125 turns is wrapped tightly around the outside of the solenoid. What is the
A solution of phosphoric acid was made by dissolving 10.0g H3PO4 in 100.0 mL water. The resulting volume was 104 mL. How do I calculate the density? Assume water has a density of 1.00 g/cm^3
A 333 mL container holds 0.146 g of Ne and an unknown amount of Ar at 35°C and a total pressure of 634 mmHg. Calculate the moles of Ar present.