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Explain how does the oxidation number change for the copper in step two? And is copper the reducing or oxidizing agent in this step?
The wire 16 in long is cut into 2 pieces, one length x and other 16-x. One piece is bent into shape of the square and other an equilateral triangle. Determine function which models total area A in t
A circular loop lies with the plane normal to the magnetic field given by B = (2.500 - 0.0100t) T, where t represents the time in seconds. The induced emf in the loop is around 2.90 V. Compute the
Determine the electron configuration for the Ni2+ ion and the Sn2+ion? Determine the numbers of unpaired electrons does each have? How do you know?
A circuit comprises of a large electromagnet which consists of an inductance of 52.0H and a resistance of 7.90 ohms, a dc 280V power source, and an open switch, all joined in series. i) Determine h
Explain what volume of 0.075 M KMnO4 will be needed to titrate 0.4555 g of K3 [Fe(C2O4)3]? Molar mass of K3[Fe(C2O4)3]=437.21 g/mol.
When the string is 2.05 m long and forms an initial angle of 35.0 degrees with the vertical, compute the speed of the particle at the given positions.
Determine the normal boiling point of CCl4? Carbon tetrachloride, CCl4, has a vapor pressure of 213torr @ 40. C and 836 torr @ 80 C.
The certain trolley travels the distance of d=245.5 meters at the angle of approximately a=29.4 degrees, rising to the height of h=310.5 meters above sea level. Determine elevation of lower end of i
Determine the molar absorptive of X? Molecule X has an absorbance of 0.287 at 247 nm when a 7.67× 10-5 M solution is measured in a 2.25 cm cell.
A thin ‘plano-convex’ lens consists of one curved surface and one flat surface. When the lens is made up of glass, then what radius of curvature must the curved face have in order to obt
A sample which is having 0.00062 g of benzene (C6H6) is dissolved in the 200.0 mL of water. The solution gives an absorbance of 0.102 at 227 nm using a 1.0 cm cell. A separate water sample containi
If the 82-foot rope is attached to top of te pole, determine mazimum distance from base of pole down hillside that rope will reach.
An electron moves with the speed of 0.97c. Determine the correct value of the electron's momentum according to the special relativity?
Determine the percent yield of aspirin when 2.978 g of acetylsalicylic acid were obtained from the 3.789 g of salicylic acid by reaction with excess the acetic anhydride.
A capacitor of 1000 pF with circular plates 1.0 cm in diameter is charging at 42 mC/s. Determine the magnitude of the magnetic field at 8.0 cm from the center of the plates?
The weight loss is due to the volatilization of CO2 (44.01 g/mol). A chemist is given a sample known to contain calcium carbonate, CaCO3. It is also known that CaCO3 (100.09 g/mol) is the only compo
Write down a typical practical illustration of Motion and describe this illustration in the context of Newton's three Laws of Motion. Please describe at least initial and final velocities, accelerat
Determine the heat of reaction for the same process at constant pressure as opposed to constant volume? The heat of formation of CO at 25o C was calculated in a bomb calorimeter to be -111,759 J
The cable reaches from top of one of the poles to some point on ground between poles and then to top of other pole. Where must this point be located to use 18 feet of cable?
A sample of water which is having 361 g absorbs infrared the radiation at 1.06 x 104 nm from a carbon dioxide laser. Assume all the absorbed radiation is converted to heat. Determine the number
i) Determine the potential energy in the spring if the block is moving at half its initial speed? ii) Determine the compression of the spring at that time?
Determine the concentrations of CH3COO - and CH3COOH in a solution in which their total concentration is 0.380 mol/L and the pH is4.46. Explain how much does the pH change if 0.0200 mol of soli
Determine the entropy change for a particle in this system if the final number of microstates is 0.596 times that of the initial number of microstates?
Evaluate this probability density for an electron in the 1s-, 2s-, and 3s- orbital's of a hydrogenic atom. A quantity important in some branches of spectroscopy is the probability density of an elec