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A solution is made with 100mL of DI water and 8mL of .10 HCL (hydrochloric acid). then 2.50mL of NaOH is added. What is the new pH?
A 6.11g sample of Cu-?Zn alloy reacts with excess aqueous HCl producing 1.26 L of H2(g) at 22.0 ?C and 728 torr. Since only the Zn portion of the alloy reacts, calculate the percent Cu in the a
A horizontal aluminum rod 4.8 cm in diameter projects 5.6 cm from a wall. A 1200 kg object is suspended from the end of the rod, Find the shear stress on the rod
Small air bubbles in the salt bridge may not be a problem. How can the presence of air bubbles in the salt bridge alter the effectiveness of this salt bridge
What evidence do you have that your product consists of a single geometric isomer or is a mixture of isomers? Does the melting point give such information
a mixture of nitrogen and hydrogen reacts as fully as possible to form a 56 l mixture of ammonia and hydrogen at stp. when this mixture is compressed to 10.0 atm and chilled to 200.0 K, all of the a
In a spherical metal shell of radius R, an electron is shot from the center directly toward a tiny hole in the shell, What is the magnitude of the electron's acceleration
Find the moment of inertia about the x-axis of the lamina that has the given shape and density (rho). Round in the thousandths place. y = x^2, y = sqrt(x); rho(x, y) = x^2
Explain how a redox reaction involves electrons in the same way that an acid-base reaction involves protons.
The Ksp value for ferrous hydroxide is 1.6 x 10/\-14. Calculate the molar concentration of ferrous ion (Fe2+) in an aqueous solution that has been buffered to maintain a pH of exactly 10.00 and is s
The Ka value for hydrocyanic acid is 4.9 x 10/\-10. Calculate the pH of a 0.095 M aqueous solution of HCN. The Kb value for pyridine is 1.7 x 10/\-9. Calculate the pH of a 0.050 M aqueous solution o
Three parallel plate capacitors are connected in series. These capacitors have identical geometries, determine the dielectric constant of the material with which it is filled
A sample of oxygen is collected over water at a total pressure of 690.7 mmHg at 19°C. The vapor pressure of water at 19°C is 16.5 mmHg. What is the partial pressure of O2
How many isomers are there for the trifluorotrinitrocobalt (III) complex? Draw them. Are any enantiomers. Label each structure with an appropriate descriptor
The color of many ceramic glazes comes from cadmium compounds, If a piece of cadmium with mass 65.6 g and a temperature of 100.0°C is dropped into 25.0 cm3 of water at 23.0°C, what will be th
The ionization constant Ka of benzoic acid is 6.3x10^-5. calculate th equilibrium concentrations of H+, benzote anion and benzoic acid. The initial concentration of benzoic acid is .10 M.
what is the pH solution if 100 mL of the solution is .15 M acetic acid CH3CO2H and contains 1.56g of sodium acetate, CH3CO2Na? Ka=1.8x10^-5
A rectangular sample of a metal is 3.5 cm wide and 475 µm thick. When it carries a 42 A current and is placed in a 0.8 T magnetic field it produces a 6.5 µV Hall emf, Determine the Hall
A buffer is made by dissolving 0.037 mol of potassium fluoride in 135 mL of 0.0237M hydrofluoric acid. Assume no volume change when the salt is dissolved. Calculate the pH of the buffer.
Use the Henderson-Hasselbach equation to calculate the pH of a buffered solution that has a propionic acid CH3CH2CO2H concentration of 0.060 M ad potassium propinate CH3CH2CO2K concentraton of .090
a 16.0 g bullet is shot into a wooden block at rest with mass 4550 h on a frictionless surface. the block moves 1.20 m/s after the bullet strikes and becomes lodged in the block, find the speed of t
The acid dissociaton constant Ka, for nitrous acd is 4.4x10^-4, what is the basicity constant Kb for the conjugaed base, nitrite, NO2-? HNO2+H20 <---->H3O+ +NO2-
Order of magnitude estimation: Using physics intuition, estimate the muzzle velocity of a projectile launcher
Plutonium- 239 decays by alpha emission. Calculate the energy emitted when 2.00mg of Pu-239 decays in this manner
Write balanced nuclear equations for (a.) the loss of an alpha particle by thorium- 230 and (b.) the fission of U- 235 to give Ba- 140, two neutrons, and another nucleus.