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Calculate the mass of copper that could be made from 4.0 g of copper oxide
A 5.0--long ladder has mass 11.0 and is leaning against a frictionless wall, making a 66 angle with the horizontal. If the coefficient of friction between the ladder and ground is 0.42, what is the
A 5.0 ml sample of vinegar was titrated with 7.2 ml of 0.55 M NaOH. if the density of vinegar solution is 1.00g/ml, what is the mass percent of acetic acid present
Consider a graph of Ecell (vertical axis) versus Temperature, T (horizontal axis) for the cell reaction Pb (s) + Cu2+ (aq) → Pb2+ (aq) + Cu (s). a. What is the expression for the slope of the g
If the create has a mass of 100 and is 1.6 tall and 0.80 in depth and width, what is the minimum force needed to make the crate start tipping? (Assume the center of mass of the crate is at its cente
A lead ball is dropped into a lake from a diving board 5.0 {rm m} above the water. After entering the water, it sinks to the bottom with a constant velocity equal to the velocity with which it hit t
Derive an expression for the standard molar entropy of a monatomic gas restricted to two-dimensional translational motion (i.e. atoms moving on a flat surface).
Determine the constant volume heat capacity, entropy, Gibbs energy of H35 Cl at 298.15K and 1 Bar pressure.
Explain why a mixture of HCl and KCl does not function as a buffer, whereas a mixture of acetic acid (CH3COOH) and sodium acetate (CH3COONa) does.
The crankshaft in a race car goes from rest to 3000rpm in 2.0 seconds. What is the crankshafts angular acceleration?
A dynamite blast at a quarry launches a rock straight upward, and 2.4 s later it is rising at a rate of 18 m/s. Assuming air resistance has no effect on the rock, calculate its speed (a) at launch
What is the pH of a buffer solution if 100.0 mL of the solution is 0.15 M with respect to acetic acid and contains 1.56 g of sodium acetate,& ; CH3COONa?
An elastic cord is 60 cm long when a weight of 73 N hangs from it but is 90 cm long when a weight of 190 N hangs from it. What is the "spring" constant k of this elastic cord?
Compare the colors of the aqueous solutions of metal ion in synthesis of potassium tris oxalato chromium iii trihydrate
What is the pressure in atmospheres of the gas inside the container connected to an open ended mercury filled manometer. The atmospheric pressure is .95 ATM
The block is spun at 50 , then the temperature of the rod is slowly increased. When the wax melts, the block slides out to the end of the rod. What is the final angular velocity?
Methyl tert-butyl ether (MTBE),C5H12O , a gasoline additive used to boost octane ratings, delta H f has = -313.6 kJ/mol. Calculate its standard heat of combustion in kilojoules.
An electric motor rotating a workshop grinding wheel at a rate of 119 rev/min is switched off. Assume the wheel has a constant negative angular acceleration of magnitude 2.50 rad/s2. Through how man
For a particular redox reaction ClO2- is oxidized to ClO4- and Cu2 is reduced to Cu. Complete and balance the equation for this reaction in basic solution. Phases are optional.
How would the force of gravity between two masses be affected if the separation distance between them is decreased by one-half?
57.0 mL of a 1.80 M solution is diluted to a volume of 238 mL. A 119-mL portion of that solution is diluted using 117 mL of water. What is the final concentration?
A 1.30 g sample of dry ice is added to a 760 mL flask containing nitrogen gas at a temperature of 25.0 degrees Celcius and a pressure of 735 mmHg. The dry ice is allowed to sublime (convert from so
Which of the following combinations is not suitable for making a buffer?