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It has been claimed that an insect called the froghopper (Philaenus spumarius) is the best jumper in the animal kingdom, What is the velocity of the insect after it has accelerated through this short
One of the reasons that back titration is preferred to direct titration is because of the limited solubility of carbonates in water. Why does this make direct titration difficult and why does back t
What would be the potential of the Cu-Zn cell be if the concentration of Cu2+ was 1.00M while the concentration of Zn2+ was 0.60M
A positive charge q1 = 2.50 µC on a frictionless horizontal surface is attached to a spring of force constant k, the distance between charges to d = 9.00 cm, Find the value of k
Explain how the Pka hisdidine 57 is important to its role in mechanism of chymotrypsin action
What is the minimum (least negative) cathode potential (versus SHE) needed to electroplate silver onto cutlery in a solution of Ag+ and NH3 in which most of the silver ions are present as the comple
A cannonball is dropped from the top of a building. If the point of release is 44.8 m above the ground, what is the speed of the cannonball
Calculate the grams of iron ion present in a 1.25 mL of a solution that required 2.20mL 0f 0.002115 M KMnO4 in a titration going to a faint pink endpoint.
A 2.50mL syringe has an inner diameter of 6.00mm , a needle inner diameter of 0.290mm , and a plunger pad diameter of 1.2 cm, What is the minimum force the nurse needs to apply to the syringe
Suppose we have a flask with a movable piston in which pressure is kept constant at 1.00atm. If an 8.00gram sample of solid ammonium nitrate is introduced into the flask what is the volume of the fl
required to reach the first equivalence point of a solution of citric acid (H3C6 H5O7), how many ml of NaOH are required to completely neutralize this solution
A 2.0cm×2.0cm×6.0cm block floats in water with its long axis vertical. The length of the block above water is 1.0cm
Liquid Chlorobenzene flows through a pipe at a rate of 3M^3/min. What is the mass flow rate of the stream in kg/h. What is the molar flow rate in mol/s
Barium chromate dissolved upon treatment with nitric acid forming an orange solution. Write a net ionic equation to represent the overall reaction that occurs.
When a certain unknown hydrocarbon is completely combusted with excess oxygen, it is observed that 1.12 L of H2O gas and 3.36 L of CO2 are produced at STP. What is the empirical formula of the unkno
Glycolic acid, which is a monoprotic acid and a constituent in sugar cane, has a pKa of 3.9. A 25.0 mL solution of glycolic acid is titrated to the stoichiometric point with 35.8 mL of 0.020 M sodiu
The middle C string on a piano is under a tension of 992 N. The period and wavelength of a wave on this string are 3.82 ms and 1.39 m
A pressure gage located 1 m off the bottom in 10 m depth of water measures an average maximum pressure of 10 N/cm2 having an average period of 9 sec
Calculate equilibrium concentration of Ag+ in a solution that is initially 0.110M AgNO3 and .870M NH3 and in which the following reaction takes place
A small, 2.10 g plastic ball is suspended by a 20.0 cm long string in a uniform electric field E = 5.60×103 i N/C, If the ball is in equilibrium when the string makes a 15.0o angle with the ver
A 1.00L Solution contains 3.50x10^-4 M Cu(NO3)2 and 2.20x10^-3M ethylenediamine(en). The kf for Cu(en)2^2+ is 1x10^20. What is the concentration of Cu2+(aq) in the solution
For an electromagnetic wave propagating in sodium, Determine the penetration depth for 10^6, 10^15, and 2*10^15 Hz
Choose the element with more negative (more exothermic) electron affinity from each of the following pairs.
Two tiny conducting spheres are identical and carry charges of -18.2 ?C and +50.3 ?C, What is the magnitude of the force that each sphere experiences
In a vacuum, two particles have charges of q1 and q2, where q1 = +3.66 ?C. They are separated by a distance of 0.213 m,