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Suppose, instead, that the heat capacity depends on the temperature as C = a+ bT+ a2 . Find an expression for the change in entropy accompanying heating from Ti to Tf.
A ship sets out to sail to a point 120 km due north. An unexpected storm blows the ship to a point 131 km due east of its starting point. (a) How far (in km) and (b) in what direction (as an angle f
Evaluate reversibility of a process where an ideal monoatomic gas is first slowly compressed 10- fold by a gradually increasing external pressure.
How many kilojoules of heat are absorbed when 40.4g of MgO(s) is decomposed into Mg(s) and O2(g) at constant pressure?
What volume of a 0.310 M NH4I solution is required to react with 979 mL of a 0.500 M Pb(NO3)2 solution?
40 g of liquid Nitrogen (boiling point = -190 C) is poured into a styrofoam cup containing 200 g of water at 50.5 C. Calculate the molar heat of vaporization of liquid Nitrogen if the final tempera
75.0 g of H2O at 23.0 oC is added to 100.0 g of H2O at 67.5 oC. What is the temperature of the resulting mixture?
Assume that patient blood lead levels are 0.590. What minimum mass of succimer in milligrams is needed to bind all of the lead in a patient's bloodstream?
Two nonconservative forces are present: friction does -2.00 104 J of work on the car, and a chain mechanism does +3.00 104 J of work to help the car up a long climb. What is the change in the car's
The Kw for the dissociation of H2O varies with temperature. At 90°C, Kw = 1.0 x 10-13. explain why pH = 6.5 is neutral at this temperature and why pH = 7 is basic.
Calculate ΔH°rxn for this reaction. ΔH°f [NaNO3(s)] = -467.8 kJ/mol; ΔH°f [NaHSO4(s)] = -1125.5 kJ/mol; ΔH°f [H2SO4(l) = -814.0 kJ/mol; ΔH°f [HNO3(g
Is it possible to separate Ca2+ from Mg2+ by selective precipitation of Mg(OH)2? To be precise, is it possible to precipitate 99.99% of magnesium without precipitating any calcium as hydroxides?
A 700 g mass is placed on a string and oscillates up and down with a period of 1.5 S. If a 1100 g mass were added to the current mass, what would be its period of oscillation?
Calculate the maximum mass of iron that can be obtained from these masses of reactants. Calculate the atom economy for this reaction
An airplane is flying in a horizontal circle at a speed of 106 m/s. The 82.0 kg pilot does not want the centripetal acceleration to exceed 6.76 times free-fall acceleration. Find the minimum radius
An unknown liquid has a density of 2.14 g/mL. How many mL would a 6.42 g sample of this liquid occupy if dispensed into a 5 mL UV/VIS spectrophotometer cuvette?
The Hydrogen gas which is released in the reaction is collected over water at 25 C. The vapor pressure of water at 25 C is 23.8 mmHg. If 3.557 L, at a total pressure of 747 mmHg, are collected, how
A 3.90-L sample of carbon monoxide is collected at 55°C and 0.901 atm. What volume will the gas occupy at 1.05 atm and 25°C?
what is the maximum amount of O2 in grams that can be obtained from 2.00x10^2 of nitroglycerin? calculate the percent yield in this reaction if the same amount of O2 generated is found to be 6.55g.
A rocket is launched at an angle of 54.0° above the horizontal with an initial speed of 100 m/s. The rocket moves for 3.00 s along its initial line of motion with an acceleration of 31.0 m/s2.
A student obtains a vinegar solution having an acetic acid concentration of 0.8512 M. What volume of 0.1036 NaOH will be required to reach the equivalence point when 25 mL of the vinegar solution is
An 54.0 N box of clothes is pulled 7.4 m up a 30.0° ramp by a force of 99 N that points along the ramp. If the coefficient of kinetic friction between the box and the ramp is 0.22, calculate th
A 60 kg pole vaulter running at 14 m/s vaults over the bar. Her speed when she is above the bar is 1.3 m/s. Neglect air resistance, as well as any energy absorbed by the pole, and determine her alt
You throw a 0.375 kg ball straight up with an initial velocity of 13.5 m/s. What is the momentum of the ball at the highest point of its path?
What is the maximum oil level in tank 2? Assume laminar flow in the horizontal pipes, and neglect kinetic, entrance-exit losses.