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A salt bridge used between copper nitrate and zinc nitrate was soaked with a saturated ammonium nitrate solution. In which direction do the ammonium ions move when the salt bridge completed to
Choose the origin to be at the location where the bullet begins to move. Then the force (in newtons) exerted by the expanding gas on the bullet is 15000 + 10000x - 25000x^2, where x is in meters. (
An iron bolt of mass 55.0 g hangs from a string 34.1 cm long. The top end of the string is fixed. Without touching it, a magnet attracts the bolt so that it remains stationary, but is displaced hor
Mothballs are composed primarily of the hydrocarbon naphthalene (C10H8). When 1.025 g of naphthalene is burned in a bomb calorimeter, the temperature rises from 24.25 C to 32.33 C.
A 23.11 kg child bounces on a pogo stick. The pogo stick has a spring constant 17044 N/m. When the child makes a nice big bounce, she finds that at the bottom of the bounce she is accelerating upwar
A 66.1 kg student is standing atop a spring in an elevator that is accelerating upward at 3 m/s2. The spring constant is 2321 N/m. By how much is the spring compressed?
Consider the mixed aldol condensation reaction of acetophenoneand 2,2,5,5-tetramethylcyclopentanone in the presence of sodium hydroxide.
A satellite of mass 5600 kg orbits the Earth and has a period of 6200 s. A) Determine the radius of its circular orbit.(meters) B) Determine the magnitude of the Earth's gravitational force on the sat
How can an equilibrium system contain small and unchanged amounts of product, yet have large amounts of the reactant? What can yousay about the relative size of Keq for such an equilbrium?
A spring stretches 7.2 cm when a 0.39 kg block is hung from it. If a 0.87 kg block replaces the 0.39 kg block, how far does the spring stretch?
What is the wavelength in nm of the radiation emitted when anelectron in hydrogen atom moves from the ni = 5 level tothe nf = 3 level?
Consider the following reaction:Ni2+(aq) +Sn(s)-> Ni(s)+Sn2+determine the minimum ratio of the tin ion to the nickel ion necessary to make the reaction spontaneous as written.
Find the concentration of calcium ions in a solution made by adding3.50 g of calcium fluoride to 750. mL of 0.125 M NaF. [ForCaF2, Ksp = 3.95 ×10-11
We learned that silicon is the second most abundant element in Earth's crust, accounting for more than one-fourth of the mass of the crust.
What mass og magnesium phosphate is produced when7.00g of magnesium hydoxide reacts with 9.00g of phosphoricacid?
When you push a 1.80- book resting on a tabletop, it takes 1.65 to start the book sliding. What is the frictional force exerted on the book when you push on it with a force of 0.90 ?
When ethanol is heated with an excess of acidified potassium dichromate,it is converted to ethanoic acid:What other substance and conditions are needed to carry out this reaction?
How long would a 2.00 kW space heater have to run to put into a kitchen the same amount of heat as a refrigerator (coefficient of performance = 4.00) does when it freezes 2.25 kg of water at 22.0&de
0.3g of magnesium is mixed with 50ml of 1mol/L HCl. The temperature of the solution increased from21.10C to 510C, What is the molarenthalpy of combutsion for magnesium?
A wire with a length of 2.7 m and a mass of 0.89 kg is in a region of space with a magnetic field of 0.72 T. What is the minimum current needed to levitate the wire?
The intensity of a sound wave is the rate of energy transferred to an area perpendicular to the waves, and is given by the relationship I = P/A. What is true about the power transmitted in a wave if
What are the mole percents of XeF4 and XeF6 in the product?15.9% ; 84.1%I really do not know how to go about doing this question.Would appreciate some help.
The higher level has a rough section of length L. After passing this section the block slides head on into a spring. The block momentarily stops after compressing the spring by d. The block initial
A diver jumps from rest at the top of a platform that is h = 8.0 m above the surface of a pool. She penetrates the water to a depth d = 4.5 m before coming to rest again. Her mass is m = 85 kg. Find
The current in the RC circuit is recorded without interruption throughout these discharging and charging steps. schematically show the expected behavior of this current as a function of time.