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The parking lot is to be formed by fencing in the rectangular plot of land except for the enterance 12 m wide along one of the sides. Determine dimensions of lot of greatest area if 30m of fencing i
The ball is thrown vertically upward with the initial speed of 80ft/sec. It's height after t seconds provided by h=80t-16t2. How high ball goes? When ball hits ground?
How can describe the total number of moles of sodium contained in the 1.9 g of sodium chloride and which is having 5.0 g of sodium sulfate.
The temperature dependence of the vapor pressure of the solid sulfur dioxide can be approximately represented by the relationship that of liquid sulfur dioxide by log(p/Torr) = 8.3186 - 1425.7/(T/K)
Describe the wavelength of light emitted when a hydrogen atom undergoes a transition from the n=250 to n=200. In what region of the EM spectrum does this wavelength fall?
For a certain liquid mixture of equal weights of nicotine and water at the 80oC, the mass of the water-rich phase is 20 g. Identify the mass of water and the mass of nicotine in the water-p
Discuss how do you synthesize the 4-chloro-3butylphenol from the benzene assuming that when the ortho and para isomers can be separated?
The box with square base and no lid is to be made from the piece of metal by cutting squares from corners and folding up sides. Cut off squares are 5 cm on a side.
Discuss how do you add the OH which is meta to the butyl group? Can it be through a benzene intermediate with the NaOH,H20, H30 as reactants once you've done Friedel-Crafts acieration which is followe
The peak width of peak A is 0.18 minutes. In a GC analysis, a pair of analytic A and B have retention times of 3.93 and 4.12 minutes, respectively, on a column with tm = 0.97 minutes.
In a GC determination of tetra-ethyl lead (TEP b), an injection which is having 1.0 :g/l of TEP b and 0.40 :g/l of nonane, used as an internal standard, gives a peak area ratio of the 3.6 (TEP
A 5 in. by 7 in. photograph is surrounded by the frame of uniform width. Area of frame equals area of photograph. Determine width of frame.
The strontium-90 deposited in the hot desert will undergo the radioactive decay more rapidly because it will be exposed to much higher average temperature. Explain is this a reasonable suggestion?
How can compare the wavelengths of an electron which is having the mass = 9.11*10^-31 kg and a proton which is having mass = 1.67*10^-27 kg, each have (a) a speed of 3.4*10^6 m/s ; (b) a kinetic en
Determine the numbers of grams of iron can be plated out at the cathode if a solution of FeSO4 is electrolyzed by a current of 1.00amp for the 30.0 minutes?
Pure benzene freezes at 5.48oC and its Kf value is 5.12oC/m. Find out the molecular weight of the compound? The freezing point of a solution of 5.884 g of an unknown non-electrolyte dissolved i
The electrical conductivities of the following 0.100 M solutions were calculated in an apparatus that contained a light bulb as the indicator of conductivity. When the rank the solutions i
Determine quatratic function based on stopping distance for 55 mph and 65 mph and fact that at 0 mph stopping distance is 0 feet.
Explain the specific tests that would require to be carried out on an unknown sample suspected of having the carbonate, sulfate, and iodide:
In the preliminary tests 3 HNO3is added to the precipitate of the silver group. Discuss what ion is probably present if a yellow precipitate remains?
A student analyzes a sample using the preliminary tests and identifies that no precipitate is obtained upon the addition of the silver ion but a precipitate is observed on the addition of barium ion
Write down balanced chemical equations for this reaction. Calcium carbide, CaCl2, reacts with the H2O to produce the acetylene, C2H2and calcium hydroxide.
Calculate the precipitation reaction that occurs with a solution when the aluminum nitrate is added to a solution of potassium phosphate. Write down a balanced equation for this reaction.
The reaction is carried out in a constant-volume container. The dimethyl ether is present, and the pressure is 0.350 atm. determine the pressure of the system after 8.0 min and assume the ideal-gas
Clumsily he knocks edge of stack and row of apples from each of trays falls to floor. Given that the total number of apples on floor is 77 how many apples were on each tray to start?