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A student made a standard solution by transferring0.0400g of NaCLinto 50ml volumetric flask, dissolving the salt and diluting the mark. She then withdrew 5ml aliquot with a volumetric pipet and tran
using the approximate values of part (b), calculate the gradient of the potential along the x axis, and show that the negative gradient is equal to the x component Ex of the electric field
On May 1, 2008, the forest service stocked a lake with 125 bluegill fish. On October 1, five months later, they estimated the population of bluegill in the lake to be 195. Find the 5-month percent c
A 10.00g sample consisting of a mixture of sodium chloride and potassium sulfate dissolved in water. This aqueous mixture then reacts with excess aqueous lead(II) nitrate to form 21.75g ofsolid.
A block of mass m1 = m is pulled up a frictionless ramp at an angle of 40 degrees by a mass of m2 = 2m connected by a light string over a frictionless massless pulley. What is the acceleration of th
What is the 4-day decay factor as a numeric value? What is the 4-day decay factor in terms of b? What is the 3-hour decay factor as a numeric value? What is the 3-hour decay factor in terms of m?
Separation of gold from other materials involve the use of potassium cyanide in the following equation:What is the minimum amount of KCN in grams needed to extract 69.3 g of gold?
A 2.0 kg object has a velocity v = 4.0i m/s at t = 0. A constant resultant force F = (2.0i + 4.0j) N then acts on the object for 3.0 s. What is the magnitude of the object's velocity at the end of t
Drug medications are often prescribed on the basis of body weight. The adult dosage of Elixophyllin, a drug used to treat asthma, is 6 mg/kg of body mass. Calculate the dose in milligrams for a 150-
How many grams of ethylene glycol are needed per kg. of water to protect radiator fluid against freezing down to -10 degress celcius?
An element crystallizes in a body-centered cubic lattice. The edge of the unit cell is 2.82A(A with a circle on top), and the density of the crystal is 7.92g/cm^3. Calculate the atomic weightof the
An inductor ( L = 42.9 mH), a capacitor ( C = 86.8 micro farad ), and a frequency of 60.0 HZ, determine the power supplied to these elements.
Acid chlorides are reactive with water. we are able to prepare the polymer of nylon 6,6 in the presence of water (5% aqueous 1,6 hexanediamine contains water) Why is this was possible?
A ball of mass m = 0.20 kg strikes a wall with an initial speed of 5.0 m/s and rebounds in the opposite direction with a speed of 2.0 m/s. If the ball is in contact with the wall for 1.5 ms what is
If 2.00 moles of a substance is dissolved in 1.00 kg of water the freezing point of the solution decreases by 7.44 celsius. does this substance dissociate to form ions in solution? why?
Verify that the functions f and g are inverses of each other by showing that f(g(x)) = x and g(f(x)) = x. Give any values of x that need to be excluded from the domain of f and the domain of g.
The "wireless" connection used by your laptop computer employs electromagnetic waves with a frequency near 2.4 GHz. (a) What is the wavelength of this radiation?
When 5.0 g of an unknown substance is dissolved in 100.0g ofwater, the freezing point of the solution decreases by 1.5 celsius. What is the molar mass of the unknown substance if the compound does n
The general equation for this is given by V t = Vpeak=sin 2pi*f*t , where Vpeak is the peak voltage (amplitude) and f is the frequency. Determine the following For time value t.
For benzene the freezing point constant, Kf is 5.12 kg mol-1and its normal freezing point is 5.5 celcius. what is the freezing point of a solution containing 100.0 g of benzene and 20.0 of naphthan
Use your value for the heat of neutralization, ΔH1,to determine the amount of heat evolved when 10.00 mL of 0.5032 MHNO3 reacts with 10.00 mL of 0.5005 M NaOH.ΔH1 = -73 kJ/mol
There is friction as the pulley turns. The block starts from rest, and its speed after it has traveled downwards a distance of D= 0.65 m, is 1.519 m/s. Calculate the amount of energy dissipated up t
The compounds listed below are followed by oxidation numbers. Determine whether these are the correct oxidation numbers for the elements in each compound.
Assume that airresistance is so small that it can be ignored and that the zeropoint of gravitational potential energy is located at the positionat which the ball leaves the thrower's hand. a. Sketc
An irreguarly shaped object of mass 2.40 kg has a moment of inertia of 4.566 kgm^2 about an axis through the point 1.05 m from its center of mass. Calculate the moment of intertia about a parallel a