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To store the energy produced in 1.0 hour by a 160 electric power plant, how many cubic meters of water will have to be pumped from the lower to the upper reservoir? Assume the upper reservoir is 340
Glucose (C6H12O6) and sucrose (C12H22O11) are both carbohydrates, using standard enthalpies of formation, calculate using significant figures the molar enthalpy of combustion to CO2 (g) and H2O (l)
Charge is uniformly distributed around a ring of radius R = 4.60 cm and the resulting electric field magnitude E is measured along the ring's central axis (perpendicular to the plane of the ring). A
A chair of weight 90.0 N lies atop a horizontal floor; the floor is not frictionless. You push on the chair with a force of F = 35.0 N directed at an angle of 37.0 degrees below the horizontal and
The leg and cast in the figure below weigh 270 N, with the center of mass as indicated by the blue arrow in the diagram. The counterbalance w1 weighs 145 N. Determine the weight w2 and the angle &al
What is missing in the nuclear reaction shown below?
A positive image distance means that the image is formed on the side of the lens from which the light emerges. Find the focal length of the lens that produces the image described in the problem intr
Calculate the hydronium ion concentration and the pH when 25.0 mL of 0.50 M NH3 is mixed with 65.0 mL of 0.19 M HCl.
How much work is done reversibly compressing one mole of an ideal gas from a starting volume of 1L to a final volume of 250mL at a constant temperature of 293K? What is the change in entropy?
You have a mass of 86 kg and are on a 54-degree slope hanging on to a cord with a breaking strength of 221 newtons. What must be the coefficient of static friction to 2 decimal places between you a
Consider the following equilibrium reaction: PCl5(g) <-> PCl3(g) + Cl2(g) ΔH0 = 92.5 kJ/mol kJ Predict the effect on the equilibrium position of the following changes
One cubic meter (1.0 m3) of aluminum has a mass of 2700 kg, and a cubic meter of iron has a mass of 7860 kg. Find the radius of a solid aluminum sphere that has the same mass as a solid iron sphere
The frequency of a given region of the electromagnetic spectrum is more than 3 x 1019 HZ. Note that the speed of light is 2.998 x 108 m/s. Which waves are found in this region?
A jetliner is moving at a speed of 275 meters per second. The vertial component of the planes velocity is 63.9 meters per second. Determine the magnitude of the horizontal components of the planes
The mass of a cube of iron is 369 g. Iron has a density of 7.87 g/cm3. What is the mass of a cube of lead that has the same dimensions?
Why was it necessary to add HCl to the mixture of cations at the beginning of the separation process? Why was it necessary to avoid adding too much HCl during this first step? After the HCl was add
A 61-kg student weighs himself by standing on a force scale mounted on a skateboard that is rolling down an incline, as shown in the figure below. Assume there is no friction so that the force exer
What is the product and mechanism for the following?
A child goes down a playground slide with an acceleration of 1.16 m/s2. find the coefficient of kinetic friction between the child and the slide if the slide is inclined at an angle of 31.0 below t
Discuss the type of intermolecular forces responsible for ranking - (NaCl, Biphenyl and Galactose)
A 100. mL sample of 0.200 M aqueous hydrochloric acid is added to 100. mL of 0.200 M aqueous ammonia in a open calorimeter having a negligible heat capactity. The following reaction occurs when the
A dock worker loading crates on a ship finds that a 20 kg crate initially at rest on a horizontal surface requires a 75 N horizontal force to set it in motion. After the crate is in motion, a horizo
Determine the percent yield for the reaction between 45.9g of NaBr and excess chlorine gas to produce 12.8g of NaCl and an unknown quantity of bromine gas.
Small, slowly moving spherical particles experience a drag force given by Stokes' law: where r is the radius of the particle, is its speed, and η is the coefficient of viscosity of the fluid med