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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.
A shot putter throws the shot with an initial speed of 15.3 m/s at a 35.0 degree angle to the horizontal. Calculate the horizontal distance traveled by the shot if it leaves the athlete's hand at a
An open-pit coal mine consumes 71 hectares of land, down to a depth of 23 m, each year. What volume of earth, in cubic kilometers, is removed in this time?
The dipole moment and bond distance measured for the highly reactive gas phase OH molecule are 1.78D and 0.98Ao, respectively. Calculate the effective charges on the H and O atoms of the OH molecule
A long, straight wire (radius = 1.8 mm) carries a current of 4.7 A distributed uniformly over a cross section perpendicular to the axis of the wire. What is the magnitude of the magnetic field at a
what volume of 0.200M hcl must be added to 250mL of 0.300M sodium mandelate to produce a buffer of solution with a pH of 3.37?
The aluminum wire used for some of these lines has a cross-sectional area of 4.60 10-4 m2. What is the resistance of ten kilometers of this wire?
What is the pH change of a 0.270M solution of citric acid (pKa=4.77) if citrate is added to a concentration of 0.145M with no change in volume?
A long, straight wire (radius = 2.5 mm) carries a current of 4.0 A distributed uniformly over a cross section perpendicular to the axis of the wire. What is the magnitude of the magnetic field at a
A rolling wheel of radius r has translational velocity v as well as angular velocity w. Combine these equations to find an expression for w in terms of v.
A 100.0 mL sample of 0.10 M NH3 is titrated with 0.10 M HNO3. Determine the pH of the solution before the addition of any HNO3. The Kb of NH3 is 1.8 × 10-5.
A roller coaster at the top of a 39.0m high vertical loop is traveling 13.8m/s. Find the maximum speed of the cars as they move through the bottom of the loop.
The longest recorded pass in an NFL game traveled 89 yards in the air from the quarterback to the receiver. Assuming that the pass was thrown at the optimal 45 ^circ angle, what was the speed at whi
Calculate the boiling point elevation of a solution containing 37.5 g of glucose (C6H12O6) dissolved in 408.6 g of water. Calculate the freezing point depression for the same solution.