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A firm wants to determine the amount of frictional torque in their current line of grindstones, so they can redesign them to be more energy efficient.
61.0 mL of a 1.20 M solution is diluted to a total volume of 288 mL, a 144 mL portion of that solution is diluted by adding 177 mL of water. What is the final concentration?
Suppose one green pepper has a mass of 125 grams. The pepper was homogenized with water and titrated coulmetrically (constant current) with iodine. After 15 minutes, at 70.00 mA the starch end point
A superhero flies 305 m from the top of a tall building at an angle of 33? below the horizontal. What is the horizontal component of the superhero's displacement?
A 0.570 kg ball is dropped from rest at a point 1.50 m above the floor. The ball rebounds straight upward to a height of 0.800 m. What are the magnitude and direction of the impulse of the net force
Suppose you were doing work to develop a better, longer lasting lithium ion battery. Your new version has a reported Ecell voltage of 3.42 compared to the SCE reference. What would the cell potentia
A 50.0 g sample of solid ammonium carbonate is placed in a closed evacuated 3.00 L flask and heated to 400 degrees C. Calculate total pressure inside the flask at equilibrium.
After a day of testing race cars, you decide to take your own 1430 kg car onto the test track. While moving down the track at 10.0 m/s, you uniformly accelerate to 32.0 m/s in 10 s. What is the aver
A 146.6-g sample of a metal at 75.0°C is added to 146.6 g of H2O at 15.0°C. The temperature of the water rises to 17.8°C. Calculate the specific heat capacity of the metal, assuming that
One mole of Ar initially at 325 K undergoes an adiabatic expansion against a pressure P external = 0 from a volume of 10.5 L to a volume of 92.0 L. Calculate the final temperature using the ideal ga
What is the total magnetic flux through the surface? Choose directions for the area vectors so that the flux through each surface is positive.
An 7.0 m, 240 N uniform ladder rests against a smooth wall. The coefficient of static friction between the ladder and the ground is 0.55, and the ladder makes a 50.0° angle with the ground. How
Suppose that 0.290mol of methane, CH4(g), is reacted with 0.440mol of fluorine, F2(g), forming CF4(g) and HF(g) as sole products. Assuming that the reaction occurs at constant pressure, how much hea
If 77.0 mL of hydrogen gas is collected over water at 50.0degrees Celsius and 763 mm Hg, what is the volume of dry gas at standard conditions? The vapor pressure of water is 92.5 mm Hg at 50.0 degre
If the reaction reaches 90.0% of completion (90.0% of the limiting reactant is consumed), what are the partial pressures of each of the products in the flask at 275?
A solution of 0.312 M of KOH is used to neutralize 15.0 mL of a 0.186 M H3PO4 solution. What volume, in milliliters, of the KOH solution is required to reach the endpoint.
The data below apply to the reaction : (CH3)3CBr + H2O(CH3)3COH + HBr. Determine the order of the reaction, therate constant, and the molar concentration of (CH3)3CBr after 43.8h .
A 4.00-kg cylinder of solid iron is supported by a string while submerged in water. What is the tension in the string? (The specific gravity of iron is 7.86.)
What is the molarity of each of the following solutions? You pipet 20.00 mL of 0.0600 M CuCl2 into a 100.00 mL volumetric flask and fill to the mark.
Given the decomposition of hydrogen peroxide, calculate the moles of oxygen gas produced from 5.20mol of H2O2.
One mole of an ideal gas is held at standard conditions. At what Kelvin temperature would the pressure be doubled?
A chemist produces 460 mL of oxygen gas at - 43 °C and constant pressure. To what Celsius temperature must the oxygen be warmed in order for it to have a volume of 600 mL?
Calculate the magnitude of the repulsive force between a pair of like charges, each of one micro-coulomb, separated by a distance of one centimeter?
Calculate the pressure (in atmospheres) exerted by 23.93 g of H2O at 36.11 °C in a 1.00 L container. The van der Waals constants for H2O are a = 5.460 L2*atm/mol2 and b = 0.03050 L/mol.
an iron sample contains fe203 and other impurities .a 752g sample of impure iron ore is heated with excess carbon producing 453g of pure iron in the reaction and that the reaction is 100% efficient