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A 1.40 kg block is attached to a spring with spring constant 18 N/m. While the block is sitting at rest, a student hits it with a hammer and almost instantaneously gives it a speed of 46 cm/s. A) W
A buffer solution is prepared by mixing 75ml of a 0.275M ofC7H5O2F wilth 55ml of a 0.472M solution of C7H4O2FNa. The pKa ofthis weak acid is 2.90. What is the pH of the buffer solution?
In a simple model of the hydrogen atom, the electron revolves in a circular orbit around the proton with a speed of 2.2*106 m/s. Determine the radius of the electron's orbit.
A 0.187-g sample of a CO32- antacid is dissolved with 25.0 mL of0.0984M HCL. The hydrocloric acid that is not neutralized by theantacid is tirated to a bromophenol blue endpoint with 5.85 ml of0.091
Calculate the electric potential due to a dipole whose dipole moment is 4.5×10-30 C*m at a point 1.4×10-9 m away. If this point is 30*above the axis but nearer the positive charge.
We are given an environmental engineer takes an air sample that hasbeen polluted with Sulfur Dioxide. The sample size is 500 mLat 700 torr and 38 Degree C.
A person looking out the window of a stationary train notices that raindrops are falling veritcally down at a speed of 5.0 m/s relative to the ground. When the train moves at a constant velocity, th
Two carpenters are hammering at the same time, each at a different hammering frequency. The hammering frequency is the number of hammer blows per second. Every 3.72 s, both carpenters strike at the
HO2 is ahighly reactive chemical species that plays a role in atmostpheric chemistry. The rate of the gas-phase reaction HO2(g)+HO2(g)→H2O2(g)+O2 is second order in [HO2] with a rate constant
A runner starts from rest and in 3 seconds reaches a speed of 9 m/s. If we assume that the speed changed at a constant rate (constant net force), what was the average speed during this 3 second inte
Google the structure and molar mass of caproic acid.Using the empirical expression given in class for the surface tension of aliphatic (saturated carbon chain) acids (with b=232.7L/mol for caproic a
A 100g of bulk water is dispersed as droplets of radius0.5x10-5 mm. If the surface tension of water is7.2x10-2 N/m, what is the change in free energy inkJ?
You've just won the $5 million cash lottery, and you go to pick up the prize. (a) What is the approximate weight of the cash if you request payment in quarters? (Assume a quarter weighs 10-3 kg and
A hot piece of silver metal , 552.0g,in mass, was dropped into acup containing 332.8g of cold water. The final temperature of the water is measured to be 18.2 celcius. It was determined that the wat
A point charge +6q is located at the origin, and a point charge -3q is located on the x-axis at D = 0.447 m. At what location on the x-axis will a third charge, q0, experience no net force from the
A S2- ion-selective electrode gave an electrodepotential of E = -0.254 V when immersed in a 7.76 10-2 M standard K2S solution. Assuming thatthe electrode behaved ideally, calculate the molarity of a
A bowling ball (mass=7.2kg, radius=0.11m) and a billiard ball (mass=0.38kg, radius=0.028m) may each be treated as uniform spheres. What is the magnitude of the maximum gravitational force that each
A student determines the molar mass of acetone,CH3COCH3, by the method used in thisexperiment. She found that the equilibrium temperature of amixture of ice and water was 1.0oC on her thermometer.
Two sinusoidal waves of the same period, with amplitudes of 4.3 and 7.1 mm, travel in the same direction along a stretched string; they produce a resultant wave with an amplitude of 9.2 mm. The phas
What is the line charge density on a long wire if the electric field 44 cm from the wire has magnitude 220 kN/C and points toward the wire?
What is this value in units of ppm (weight/weight)? Did the water from the Dublin Road Water Plant contain an acceptable level of nitrates?
A child's water pistol shoots water through a 1.0 mm -diameter hole. If the pistol is fired horizontally 80 cm above the ground, a squirt hits the ground 1.2m away. What is volume flow rate during t
What is the pH of a solution prepared by adding 20.0mL of 0.10M acetic acid and 10.0mL of 0.10M sodium acetate? What is the pH after the addition of 1.0mL of 0.10M HCl to15mL of the solution?
The great, gray-green, greasy Zambezi River flows over Victoria Falls in south central Africa. The falls are approximately 108 m high. If the river is flowing horizontally at 3.60 m/s just before go
Boron has primarily two isotopes one withatomic mass of 11 amu and the other with an atomic mass of 10 amu.if the abundances of the boron atom with a mass of 11 amu is 18.9%and the abundance of the