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The polystyrene coffee cup calorimeter is very good insulator.However, it still absorbs a small amount of heat if the system is above room temperature.How does this affect the specific heat of the
What are possible sources of error and their possible effect on the equilibrium constant value in determination of equilibrium constant experiment.
What is the magnitude of the change in momentum of the ball while in contact with the bat if the ball leaves with a velocity of (a) 18 m/s, vertically downward, and (b) 18 m/s, horizontally back tow
A 115 mL sample of a 11.0 M ethylene glycol (rm C_2H_6O_2) solution is diluted to 1.40 L. What is the freezing point of the final solution? (Assume a density of 1.06 g/mL for the final solution.)
Calculate the pH of a buffer formed by mixing 85 ml of 0.12 M lactic acid with 95 ml of 0.15 M sodium lactate.
A certain string just breaks when it is under 400 N of tension. A boy uses this string to whirl a 10-kg stone in a horizontal circle of radius 10 m. The boy continuously increases the speed of the s
Explain how the solution containing equimolar amounts of HCHCO2 and KCHO2 resist change in pH when strong acid is added and also when strong base is added?
If 6.46 L of gaseous ethanol reacts with 16.1 L O2, what is the maximum volume of gaseous carbon dioxde produced
Determine the Ka of an acid whose 0.294 M solution has a pH of 2.80
A piston has an external pressure of 13.0 atm. How much work has been done in joules if the cylinder goes from volume of 0.150 liters to 0.570 liters?
Calculate the concentrations of all species in a 1.29 M Na2SO3 (sodium sulfite) solution. The ionization constants for sulfurous acid are Ka1=1.4x10^-2 and Ka2=6.3x10^-8.
The value of Kp for Br2(g)............2Br(g) at 700 K is 2.9e-5.At 500 K value of Kp be higher,lower or the same as that at 700K.Explain ? first predict whether this reaction is endothermic or exot
Calculate the number of moles of gas in a 3.24 L basketball inflated to a total pressure of 24.3 psi (pounds per square inch) at room temperature (25 degrees Celsius).
A turntable accelerates from rest with a constant angular acceleration of 1.5 rad/s. A ladybug is standing near the edge of the spinning record. Which plot best represents the total linear accelerat
If the formula for potassium chlorate is KClO3 and the formula for magnesium fluoride is MgF2, then what is the formula for magnesium chlorate?
On the Apollo 14 mission to the moon, astronaut Alan Shepard hit a golf ball with a golf club improvised from a tool. The free-fall acceleration on the moon is 1/6 of its value on earth. Suppose he
0.5585g of ferrous ammonium sulfate hexahydrate requires 21.45 ml of KMnO4 solution to reach a pink endpoint.What is the molarity of the KMnO4 solution?
Determine the molality of a solution made by dissolving 50.0 g of glucose (C6H12O6, molar mass = 180.1 g/mol) in 294 g of water.
A rocket is launched at an angle of 53.0° above the horizontal with an initial speed of 101 m/s. The rocket moves for 3.00 s along its initial line of motion with an acceleration of 32.0 m/s2.
What types of reactions could happen if the materials mixed? What precautions do you need to take with each of these materials?
One tire is inflated to a pressure of 40 and goes a distance of 18.0 ; the other is at 105 and goes a distance of 93.4. Assume that the net horizontal force is due to rolling friction only and take
when the cations Na+ K+ Cs+ are combined with chloride ion in the gas phase to form ion pairs, which pair formation releases the greatest amount of energy? KCL or RbCl, or NaCl or CsCl.
Iron(III) oxide reacts with carbon to give iron and carbon monoxide. How many grams of C are required to react with 16.5 g of Fe2O3?
Magnesium hydroxide is used in several antacid formulations. When it is added to water it dissociates into magnesium and hydroxide ions.
An object with mass m1=%.00kg rests on a frictionless horizontal table and is connected to a table that passes over a pulley and is then fastened to a hanging object with mass m2=10.0kg. Find the ac