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A sodium lamp employed to calibrate a diffraction grating exhibits the first-order sodium line at 24.3 from the central maximum. i) Determine the angular position of the first spectral line in hydroge
Assuming the complete dissociation of HCl and the lead salt, determine how much HCl is to be added to a 0.001 M lead salt solution to just prevent precipitation when saturated with the H2S.
The calorimeter contained 500 g of water and the temperature rise measured was 1.40oC when a sample of magnesium metal (0.1946 g) was ignited in a constant-volume calorimeter of heat capacity 1349J/o
If Venus is close to Earth and it emerges in a crescent phase. You can see this by employing a good pair of binoculars. i) Employ the astronomical data to find out the angular width of Venus if it is
Annual operations and maintenance after completion is evaluated to be $40 million, payable at the end of year and with 5% annual increase thereafter.
Aluminum hydroxide and nitric acid reacts to produce the water and aluminum nitrate. Add the coefficients (including the 1) when you have balanced this equation.
A red laser of 630 nm is aimed via a 0.122 mm diameter circular pinhole. In the resultant diffraction pattern, find out the angle from the central maximum to the first dark ring?
The bright yellow sodium line in the sodium spectrum is in reality a pair of closely spaced lines at around 589.0 nm and 589.6 nm. You view the sodium spectrum by using a diffraction grating having
Rust stains can be removed by washing a surface with a dilute solution of oxalic acid (H2C2O4). Explain what mass of rust can be removed by the 1.0 L of a 0.14 M solution of oxalic acid?
If the switch is closed and the coil carries a current I, a mass m should be added to the right side to balance the system. i) Determine an expression for the magnitude of the magnetic field and find
Discuss the coordination chemistry and chemical speciation utilized in the analysis of fluoride in water samples by fluoride ion-selective electrode.
Suppose 264 g of Na metal is formed. Electrolysis of molten NaCl in a Downs cell is the major isolation step in the production of sodium metal.
Determine how many seconds does it take to deposit 2.87 g Ni on a decorative drawer handle when the 13.1 A is passed through a Ni (NO3)2 solution?
a siren consist of an intensity of around 107.2 W/m2 at a certain point, and a second sound wave from a close by ambulance consists of an intensity level 9 dB greater than the siren's sound wave at
A typical cell phone conveys microwaves having peak output power of around 2 W. When you suppose the cell phone is a point source, determine what would be radiated power at your brain 5 cm away from
What is the molarity of the sulphuric acid when a 10.00 mL sample of sulfuric acid from an automobile battery requires 35.08 mL of 2.12 M sodium hydroxide solution for complete neutralizati
Find out the induced emf in a circle of tissue of radium 1.6 mm which is perpendicular to the direction of the field.
Determine the concentration of an aqueous KCl solution if the 25.00 mL of the solution gives 0.430 g of AgCl when treated with an excess of AgNO3?
Your instructor asks you to design and build a refracting telescope encompassing a magnification of 45 by employing an available eyepiece of focal length 4.0 cm. Determine how long must you make the
Illustrate the skeletal structure of the compound with molecular formula C3H4Cl4 whose proton NMR spectrum contains a downfield quartet and an up field doublet with relative integration of 1:3.
If water freezes, it expands around 9.00%. Determine what would be the pressure raise within your automobile engine block when the water in it froze? The bulk modulus of ice is around 2.00 x 10^9 N/
Determine the free-energy change for ammonia synthesis at the 25oC given the following sets of partial pressures:
If an acid solution weighing 57.012 g was added to the tablet, carbon-dioxide gas was released, generating a fizz. The resultant solution weighed 57.743 g. Determine how many grams of carbon-dioxide
In qualitative analysis, Hg22+, Ag+ and Pb2+ are separated from other cations by addition of the HCl. Determine the concentration of Cl- needed to just begin precipitation of AgCl, Hg2Cl2, a
Show whether this reaction is a thermally allowed or forbidden reaction using frontier molecular orbital. Consider the internal addition reaction of cis 1, 3, 5 hexatrieneto form 2,2,0- bicyclohexe