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When a sample of a simple hydrocarbon,CxHy, is burned in oxygen 0.300 g ofCO2 and 0.123 g of H2O are isolated. Themolecular weight of the compound was determined to be 70.1 g in aseparate experiment
A car traveling 85 km/hr strikes a tree. the front end of the car compresses and the driver comes to a rest after traveling 0.80m. What was the average acceleration of the driver during the collisio
An 8.1g bullet is fired with a velocity of 109m/s into a 98g block of wood at rest on a frictionless surface. The bullet lodges in the block and they slide off together. What is the final velocity o
A common laboratory reaction is the neutralization of an acid with a base. When 60.0 mL of 0.25 M nitric at 24.5 degree C is added to 60.0 mL of 0.275 M NaOH at 24.5 degree C in a coffee cup calorim
A computer disk rotates at a constant angular speed of 34.1rad/s while being read. when searching for a file, the disk spins for 0.892s. a) what is the angular displacement of the disk during this t
Brass is a substitution alalloy consisting of a solution of copper and zinc. A particularsample of red barss consisting of 78% Cu and 22.0% Zn by mass has adensity of 8760 Kg/m^3. what would the mol
The law of conservation of momentum applies to a collision between two bodies if: a. they exert equal and opposite forces on each other. b. they exert forces on each other respectively proportional to
Additional air is admitted from the supply line, causing the piston to rise another 20mm. What is the pressure inside the cylinder at this point?
Lead sulfide, PbS (commonly called galena), has the same formula as ZnS. Does PbS have the same solid structure as ZnS? If different, how are they different?
A ball with a mass of 12g moving at +15.0m/s collides with a second ball of mass 36g moving at +5.0m/s. After the collision, the 12g ball moves at +6.0m/s. What is the change in momentum of the 36g
You observed that if you apply a perpendicular force of 5.5N at a distance of 24.0cm from the axis of rotation, you ca accelerate the object from rest to 3.0 rev/s in just 1.0s. What is the moment o
When Iodine, I2 dissolves in water, whattype of intermolecular forces exist between the I2 and Water? When CaCl2 dissolves in water, what type of intermolecular forces exist between water and the CaCl
A person is standing on the roof of a tall building. She throws a ball from the top of the building in such a way that when the ball passes a window cleaner who is 2.0m from the top, it is falling
A person exerts a force of 28N on the end of a door 84cm wide. What is the magnitude of the torque if the force is exerted... a) Perpendicular to the door?
A gasmixture contains 1.28 g N2 and 0.85 g O2 in a1.55 L container at 18 ºC. Calculate the mole fraction and partial pressure of each gas component in the gas mixture.
The kid twirls it just fast enough to keep it moving in a complete circle, results in a centripetal acceleration of 5.00 g at the lowest point. Find the speed of the yoyo at the highest point, lowes
On December 1, 1783 Jacques Charles became the first human to pilot a non-tethered hydrogen balloon. He flew the balloon for fifteen miles and stayed in the air for a total flight time of 45 minutes
As the contents of the container come into thermal equilibrium with the surroundings, the liquid helium vaporizes and turns into gas. If the temperature of the laboratory is 21.2°C, what is the
(a) What is the net electric force on the flea? (b) One of the charges is removed. Find the magnitude of the new net electric force on the flea.
Gas cylinder A has a volume fo 48.2 L and contains N2(g)at 8.35 atm at 298 K. Gas cylinder B has an unknown volume and contains He(g) at 9.50 atm and 298 K.
Two balls of radius 2.00 mm have a separation between their centers of 5.33 cm. The same electric charge is placed on both balls so that there is a repulsive force between them of 3.10 N. Assume tha
An 80.0-N box is pulled 20.0 m up a 30 degree incline by an applied force of 100 N that points upwards, parallel to the incline. If the coefficient of kinetic friction between box and incline is 0.2
A rabbit runs in a straight line with a velocity of +1.3 m/s for a period of time, rests for 12 s, and then runs again along the same line at +0.54 m/s for an unknown amount of time. The rabbit trav
A new temperature scale is proposed based on the melting and boiling points of benzene. Zero on the new scale is the melting point of benzene and 100deg on the new is is boiling point of benzene.
After a reaction time 0.300 s the policeman begins to pursue the speeder with an acceleration of 4.00 m/s^2. Including the reaction time, how long does it take for the police car to catch up with th