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The visible spectrum part of metal atom bright line spectra is used to produce the colors seen in fireworks. The atoms are excited by the explosion and then emit their characteristic color. Complete the table by using an equation to calculate the frequency s-1 and an equation to calculate the photon energy in J for eah of these wavelengths.
Color: Red
Metal: Stronntium (Sr)
Representative compound: SrCo3
Wavelength: 650 nm
Frequency(s-1): ?
Photon Energy(J):?
Color: Orange
Metal: calcium (Ca)
Representative compound: CaCl2
Wavelength: 670 nm
Color: Yellow
Metal: Sodium (Na)
Representative compound: NaNO3
Wavelength: 610 nm
Color:Green
Metal: Barium (Ba)
Representative compound: BaCl2
Wavelength: 590 nm
Color: Blue
Metal: Copper (Cu)
Representative compound: CuCl2
Wavelength: 520 nm
Determine the average atomic mass of boron is the natural abundance of 10B weighing exactly 10.0129 amu is 80.1% and the natural abundance of 11B weighing exactly 11.0093 amu is 19.9%.
Consider two solutions. One solution is 0.1115 M Ca(OH)(2). The other is 0.1050 M HClO(4). a) Write a balanced equation for the reaction between the two solutions.
One gallon of gasoline in an automobiles engine produces on the average 9.50 kg of carbon dioxide. Calculate the annual production of carbon dioxide in kg if there are 40 million cars in the US and each car covers a diastase of 5000 miles at a con..
If 32.78 mL of NaOH solution is required to neutralize 20.00 mL 0f 0.2500 M of oxalic acid, H2C2O4(aq), what is the concentration of the NaOH solution. The balanced equation is: 2 NaOH(aq) + H2C2O4(aq) ? Na2C2O4(aq) + 2 H2O(l)
Chemistry: Change in Temperature in the Production of Silver Chloride, When solutions containing silver ions and chloride ions are mixed, silver chloride precipitates:
When 1.550 g of liquid hexane (C6H14) undergoes combustion in a bomb calorimeter, the temperature rises from 25.87 ºC to 38.13 ºC. Find ?E rxn for the reaction in kJ/mol hexane. The heat capacity of the bomb calorimeter, determined in a separate e..
calculate Kc for the reaction below: 2P(g)+ 5Cl2(g) 2PCl5(g) The answer provided is 240. Why is that?
Use an Arrhenius plot to determine the activation barrier for the reaction. Express your answer using three significant figures. (units = kJ/mol)
nonvolatitle organi polymer dissolved in 250mL of benzene has an osmotic pressure of 12.3 mmHg at 25 degree celcius. What is the molar mass of the polymer in units of g/mole?
Stripping Analysis of Metals in Industrial Samples
Define when 5.00 mol of benzene is vaporized at a constant pressure of 1.00 atm as well as at its normal boiling point of 80.1°C, 169.5 kJ are absorbed and PV for the vaporization process is equal to 14.5 kJ then E = kJ and H = kJ.
A student found that her mixture was 15% NH4Cl, 20% NACL, and 75% SiO2. Assuming her calculations are correct, what did she most likely do incorrectly in her experiment?
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