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If 25.0 mL silver nitrate solution reacts with excessive potassium chloride solution to yeild 0.628 g precipitate, what is molarity of the silver ion in the original solution?
Water flows at 0.25 L/s through a 12-m-long garden hose 2.5 cm in diameter that is lying flat on the ground. The temperature of the water is 20 degrees C. What is the gauge pressure of the water where
The mass spectrum of an organic compound,C40H82 contains M+ and M+1 peaks. If we assume the intensity ofM+ peak 100, what would be the intensity of M+1peak? Note: Ignore any effect of higher isotop
A pump is used to empty a 4000 L wading pool. The water exits the 3.0-cm-diameter hose at a speed of 2.2 m/s . How long will it take to empty the pool?
Lemon juice is a complex aqueous solution that does not freeze in ahome freezer at temperatures as low as -11 °C. At what temperature will the lemon juice freeze if it effective molality is the
A 95 kg clock initially at rest on a horizontal floor requires a 650 N horizontal force to set it in motion. After the clock is in motion, a horizontal force of 560 N keeps it moving with a constant
The label of an antacid tablet bottle states that each tabletcontains 480 mg of CaCO3. A tablet weighs 1.40 g. What weight of the tablet will be required to use 20mL of0.050 M EDTA solution?
How much KNO3 must be added to 500ml of media solution such that it would contain 0.1 M KNO3? What is the equivalent in ppm?
Suppose a particle with a positive charge were to move a certain distance, say 0.1 meters, in a uniform electric field. What direction should it move in order for the field to do the greatest amount
A piece of metal with mass of 125grams is placed into a graduatedcylinder that contains 25.0ml of water raising the water level to56.0ml. what is the density of the metal?
If the average force of friction is equal to one-fifth of its weight, with what speed will the car reach the lowest point, which is 35.0m below the highest point? The distance traveled is 45.0m.
A spherodial bacterium with diameter of 1 um contains two molecules of a particular protein. What is the molar concentration of the protein? How many gluclose molecules does the cell contain when it
Find the work done on the skateboard by the rope in 25 seconds. Assuming the velocity of the bike is the same as that of the skateboarder, find the work the bike does on the bicycle in 25 seconds.
A student took 0.0040 moles of kyptonite metal and reactedit with water in a manner similiar to that used in this experiment.She then titrated the resulting solution and found that it required2.0 ml
What is the volume V of a sample of 4.30 mol of copper? The atomic mass of copper (Cu) is 63.5 g/mol, and the density of copper is 8.92 x 103 kg/m3.
A uniform electric field of magnitude 435 N/C pointing in the positive x-direction acts on an electron, which is initially at rest. The electron has moved 2.70 cm. (a) What is the work done by the f
Suppose you have a buffer at pH 5.0 that is 1.00M in HX and 1.00 M in X-, where HX is a weak acid with Ka = 1.0 x 10^(-5) M. Calculate the effects of adding 50ml of 1.0 M HCl to a 1 liter portion of
At what speed v does the gasoline begin to shoot out of the hole? Assume the pressure outside the tank is 1 atm or 1.01×105 Pa.
The density of a certain gaseous compound of nitrogen and oxygen is 2.00g/L at 297 K and 1.06 atm. What is the molecular mass of the compound? Its molecular formula?
A river 16.0 m wide and 5.0 m deep drains a 3000.0 km2 land area in which the average precipitation is 48 cm/year. One-eighth of this rainfall returns to the atmosphere by evaporation, but the remai
In the simulation above the length and orientation of the blue and yellow vectors can be changed by dragging the tips of the vectors. Given the limits available in the simulation, find the following
A reaction has a standard free-energy change of -13.00 kJ mol -1 (-3.107 kcal mol -1 )Calculate the equilibrium constant for the reaction at 25 degreeC.
what is the final voltage across the plates and the final energy stored?
Consider an Ideal Gas being heated reversibly from T1 to T2 at a constant volume and then allowed to expand isothermally and reversibly back to its original pressure. What is the change in interna
A string is tied between two walls 8 m apart. Which of the following is not an allowed standing wavelength for this string?