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A 8.65-L container holds a mixture of two gases at 31 °C. The partial pressures of gas A and gas B, respectively, are 0.206 atm and 0.867 atm. If 0.200 mol a third gas is added with no change in
Element Z has two natural isotopes: Z-79 (78.918 amu) and Z-81 (80.916 amu). Calculate the atomic mass of element Z given the abundance of Z-81 is 49.31%.
A planet with mass 5.98 × 1024 kg orbits a star with mass 1.99 × 1030 kg. Determine the kinetic and potential energy at the aphelion.
A 3.40 kg steel ball strikes a wall with a speed of 9.0 m/s at an angle of 60.0° with the surface. It bounces off with the same speed and angle. If the ball is in contact with the wall for 0.200
What is the amplitude of the temperature fluctuations produced by a sound of intensity, 10 W/m^2, in air at 20 degrees C and std atmospheric pressure?
A motorboat heads due east 13.3 m/s across a river that flows toward the south at a speed of 4.5m/s. What is the magnitude of the resultant velocity relative to an observer on the shore?
A solution, which was made by dissolving 62.07 g of a nonelectrolyte in 500 g of water, exhibits a freezing point of -1.86 °C. What is the molecular weight of this nonelectrolyte compound? For w
Investigators at the scene of an automobile accident where the driver drove off a 20.0 m high cliff determine that the auto was traveling at a speed of approximately 30 m/s upon impact with the grou
Find the following when the current in the solenoid increases to 5.0 A in a period of 0.90 s. the change in the magnetic flux through the coil.
an empty gasoline can with dimensions 19 cm by 47.7 cm by 13.0 cm is attached to a vacuum pump and evacuated. if the atmospheric pressure is 14.7 lb/in^2, what is the total force in pounds on the ou
Consider the three-pulley arrangement shown in the figure below. The three masses m_1, m_2 and m_3 have the values 2.0 kg, 5.0 kg, and 4 kg respectively. All the pulleys are frictionless, and the st
In the course of a titration of barium ion in a sample by sulfate ion in a titration solution, 83.5mL of the .200 M Na2SO4 was required to precipitate all the barium ions. How many grams will the dr
The wires are each 75.0 long and have a mass of 5.50 .If both of them are simultaneously plucked at the center, what is the frequency of the beats that they will produce when vibrating in their fund
Assuming constant specific heats for the air at room temperature, determine the average temperature of the air in 30 min. Assume the air pressure in the room is constant at 100 kPa
An "empty" gasoline can with dimensions 19.4 cm by 35.8 cm by 12.0 cm is attached to a vacuum pump and evacuated. If the atmospheric pressure is 14.7 lb/in2, what is the total force (in pounds) on t
What is the minimum coefficient of friction between tires and road that will allow cars to negotiate the turn without sliding off the road?
A certain brine has 3.88% NaCl by mass. A 75.0-mL sample weighs 77.0g .How many liters of this solution should be evaporated to dryness to obtain 725kg NaCl?
The tractor beam exerts a constant force of on the shuttlecraft. Both spacecraft are initially at rest. How far does the starship move as it pulls the shuttlecraft aboard?
How many grams of H3PO4 can be formed from 2.65 mol P4O10? Assume an excess of water.
Baking soda is sodium bicarbonate (NaHCO3). When you heat baking soda, it breaks down into sodium carbonate powder (Na2CO3), water vapor, and carbon dioxide. The enthalpy of this reaction is 129 kJ.
A potential difference of 90 mV exists between the inner and outer surfaces of a cell membrane. The inner surface is negative relative to the outer surface. How much work is required to eject a pos
A sample of 30.0 mL of Krypton gas, Kr, is at 756 mmHg and 25°C. What is the new volume if the pressure is decreased to 325 mmHg and the temperature is decreased to -125°C.
A hunter aims directly at a target (on the same level) 80.8 m away. If the bullet leaves the gun at a speed of 177 m/s, and misses by 1.02 m, at what angle should the gun be aimed so as to hit the t
When pure carbon is burnt in air some of it is oxidized to CO2 and some to CO. If the molar ratio of N2 to O2 is 7.18 and the molar ratio of CO to CO2 is 2, what is the percentage excess air used? E
Find the circular speed of a synchronous satellite in its path around the earth, given the following numbers: G=6.673 x 10^-11 (N-m^2/kg^2); earth mass = 5.98 x 10^24.