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If 10.0 mL of 0.00200 M KNCS is mixed with a very large excess of Fe(NO3)3, how many moles of FeNCS2+ product should form
A ball of mass 0.220 kg that is moving with a speed of 6.3 m/s collides head-on and elastically with another ball initially at rest. Calculate the mass of the target ball
What volume of CO2 (g) at STP is formed when 6.00 g of cyclopentadiene, C5H6 (g) is fully oxidized
Two forces, 375 N at 11deg and 323 N at 25deg are applied to a car in an effort to accelerate it. If the car has a mass of 3730kg, what magnitiude of acceleration does it have
Does GLC analysis allow you to skip the IR analytical method? Compare the two methods for advantages and disadvantages.
A black precipitate remaining from the seperation of Cr^3+ and Fe^2+ ions is dissolved in HCl and HNO3. Some NH3 is added, followed by several drops of dimethylglyoxime. (a). A colorless solution re
The addition of s^2- ion to Fe(OH)2(s) results in the formation of FeS(s). Explain why the addition of S^2- ion to Cr(OH)3(s) does not result in the formation of Cr2S3(s)
A solution contains either cr^3+ or Ni^2+ ion. describe a reaction with a single reagent that will identify which ion is present
A block is released from the top of a frictionless incline plane as pictured above. calculate how fast it is moving at the bottom using Conservation of Energy
Draw the Lewis structures for the following compounds. 1) PBr3 Using VSEPR, what is the shape about the P. 2) N2H2 3) CH3OH Using VSEPR, what is the shape about the C and about the O? 4) CO2 Using V
A 40.3-cm diameter disk rotates with a constant angular acceleration of 2.50 rad/s2. Find the linear velocity and tangential acceleration of P at t = 2.30 s
Students were instructed to mix the benzaldehyde and acetone starting materials in their conical vials before adding the ethanolic sodium hydroxide solution. a. Why was this essential to the success
The strongest person in the world lifted th read end of his car a mass of 615 kg a verticle distance of .24 meters. How much work did he do to life the car
A 0.140-mole quantity of NiCl2 is added to a liter of 1.20 M NH3 solution. What is the concentration of Ni2 ions at equilibrium? Assume the formation constant* of Ni(NH3)62 is 5.5 × 108.
At the top of a building with a height of 70 m, a ball is thrown vertically upward at time t = 0 with an initial velocity of 12.0 m/s. find the time at which the ball reaches its highest point
29.0g of copper pellets are removed from a 300?Coven and immediately dropped into 110mL of water at 23.0?C in an insulated cup. What will the new water temperature be
A mixture of 80.0mL of hydrogen and 60.0mL of oxygen is ignited by a spark to form water. a) Does any gas remain un-reacted. Which one. b) What volume of which gas (if any) remains un-reacted
Suppose a crate of mass 8.4 kg is placed on the plank in the figure below at a distance x = 8.3 m from the left end. find the forces exerted by the two supports on the plank
A student at the top of a building throws a ball straight upward with an initial speed v0. How do the final velocities of the balls compare when they reach the ground
A Brayton-cycle heat engine follows the cycle shown in the figure. The heat input from the burning fuel is 2.0 MJ per cycle. Determine the engine's thermal efficiency by explicitly
The ionization constant or dissolution constant (KA) for acetic acid (HAc) is 1.8×10-5. (1) Write down the dissociation reaction. (2) Estimate pH of a solution containing 0.6 g of acetic acid
A group of students have measured the time it takes for a cart to travel some distance along a level track. What is the best estimate of the relative error in their determination of the cart´s s
The water skier there has a mass of 66.0 kg. Find the magnitude of the net force acting on the skier when she is accelerated from rest to a speed of 14.0 m/s in 9.20 s
For a metal salt (MX3) that has a Ksp value of 3.5 x 10-5, what is the delta G for the following reaction? M3+ + 3 X- <-> MX3(s)
A galvanometer has a coil resistance of 48.0 ?. It is to be made into a voltmeter with a full-scale deflection equal to 100.0 V. what size resistor should be placed in series with the galvanometer