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Marble chips (calcium carbonate, CaCO3) react with hydrochloric acid, HCl, to produce calcium chloride, CaCl2, water and carbon dioxide according to the following reaction: CaCO3 + 2 HCl CaCl2 + H2
A simple single lens camera (biconvex lens) is used to photograph a man 1.5 m tall who is standing 5.0 m from the camera. if the mans image fills the length of a frame of film (35mm) what is the fo
'Natural gas' can be represented by CH4 (methane) and "gasoline" can be represented by C8H18 (octane). Write the chemical formulas for the combustion of methane and octane.
Water containing 4 lbs/gal of salt enters at a rate in gal/min equal to half the current volume of water in the tank, and the well-stirred mixture leaves the tank at a rate in gal/min equal to a thi
A projectile is launched with an initial velocity of 80 m/s at an angle of 30º above the horizontal. Neglecting air resistance, what is the horizontal component of the projectile's acceleration
What are the magnitude and direction of the change in the translational momentum of the truck?
How many liters of hydrogen gas is formed from the complete reaction of 18.9 g C? Assume that the hydrogen gas is collected at a pressure of 1.0 atm and a temperature of 350 K.
Crate on an Incline To push a 20.0 kg crate up a frictionless incline, angled at 16.0° to the horizontal, a worker exerts a force of magnitude 200 N parallel to the incline. The crate slides 1.4
The Apollo Lunar Module was used to make the transition from the spacecraft to the moon's surface and back. Consider a similar module for landing on the surface of Mars. Use conservation of mechanic
An electron moves with constant velocity through a region of space that is free of magnetic fields. Can one conclude that the electric field is zero in this region?
Calculate change in Gibbs free energy for the reaction CO(g) +1/2O2(g)-CO2(g) at 298.15 K. Calculate Change in Gibbs free energy reaction at 650 K assuming that enthalpy change in reaction is consta
At 3.87 s after the explosion, the 2-kg fragment lands on the ground directly below the point of explosion. (a) Determine the velocity of the 0.97-kg fragment immediately after the explosion.
A 0.10kg dart is fired horizontally at the center of a 0.80kg vertically hanging block, sticking to it. The system reaches a maximum height, h, of 0.20m above the collision point. Find: a) The velo
Suppose that 0.100atm each of the gases CO,H2,CO2 and H2O is placed in a container and allowed to come to equilibrium. Calculate the equilibrium pressure of all gases. (Kp=1.85) for the reaction CO(
A truck is traveling at 11.1 m/s down a hill when the brakes on all four wheels lock. The hill makes an angle of 12.0° with respect to the horizontal. The coefficient of kinetic friction between
A student carried out a simple distillation of toluene for purification. Gas Chromatography analysis indicated the obtained fraction was 100% pure.
How many years would it take to double the Sun's mass at this rate? How would the mass accretion affect the Earth's orbital period/distance from the Sun?
If the activation energy of a unimolecular reaction is 63kj mol-1, what fraction of the reactant molecules have sufficent energy to react at 9 degrees C? what fraction of the reactant molecules hav
Using energy conservations, how would your calculated final velocity change if you threw a ball off a building straight downward at the same speed as you threw it upward? Explain/give an example.
If a dielectric is inserted between the plates of a parallel-plate capacitor that is connected to a 100-V battery, which decreases? The electric field between the plates decrease, voltage across cap
A fishing boat accidentally spills 15 barrels of diesel oil into the ocean. Each barrel contains 42 gallons. If the oil film on the ocean is 2.5 × 102 nm thick, how many square meters will th
What is the vacuum wavelength vacuum in the visible range (380 nm to 750 nm) at which destructive interference causes the film to look dark in reflected light?
If 26.8 grams of lithium hydroxide is mixed with 250ml of water to form a solution which is then reacted with boron fluoride, how many grams of each product will be formed?
A potential difference of 120 V produces a current of 8.0 A in the heating element of a toaster. What is the resistance of this heating element while the toaster is carrying this current?
Suppose that the microwave radiation has a wavelength of 12.4 cm. How many photons are required to heat 275 mL of coffee from 25.0 celsius to 62.0 Celsius?