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Sodium lights are often utilized in street lamps because the emitted light is essentially monochromatic, decrease blurriness in human vision that is due to astigmatism. The professed "D-line" of the sodium emission spectrum has a wavelength of 5893 Angstroms. Presuming the emission is due to an electron transition between two consecutive energy levels, compute the energy levels involved
Determine the molecular formula of the oxide of phosphorous when it is in its gaseous state.
If the desired dose is achieved in 5 minutes at the beginning of the calendar year, how much irradiation time is needed to keep the dose the same three months later
Explanation for the Chemical Structure of Hydrocortisone, Can you please explain the chemical structure of cortisol and hydrocortisone? What is the difference on the structure? How many functional groups hydrocortisone has and what are they?
Isopropyl alcohol, a substance sold as rubbing alcohol, is composed of C, H, and O. Combustion of 0.255 g of isopropyl alcohol produces 0.561 g of CO2 and 0.306 g of H2O. Determine the empirical formula of isopropyl alcohol.
Two moles of potassium chloride and three moles of oxygen are produced from the decomposition of two moles of potassium chlorate, KClO3(s). Write the balanced equation. How many moles of oxygen are produced from 12 moles of potassium chlorate?
IF A 368-g sample of water absorbs infrared radiation at 1.06x104 nm from a carbon dioxide laser. Presume all the absorbed radiation is converted to heat, Compute the number of photons at the wavelength essential to raise the temperature of water ..
What solution will have the lowest boiling point?? 0.075 M CaCl2 0.020 M Na3PO4 0.050 M KNO3 0.025 M NH4NO3 0.10 M C6H12C6
Helium is compressed isothermally and reversibly at 100 celcius from a pressure of 2 to 10 bar
the excess HCl required 5.99 mL of 0.0983 M NaOH for titration. Calculate the percentage of nehohetramine in the sample.
Explain the development of the modern periodic table. Comprise contributions made by Lavoisier, Newlands, Mendeleev, and Moseley.
A gaseous mixture containing 0.220 mol fraction of carbon tetrachloride (CCl4) and 0.780 mol fraction of dry air is initially at 75.0°C and 1117 mmHg
assuming no energy is transferred to or from the surroundings, calculate the final temperature of the water after all the ice melts heat capacity(s) 37.7 jmolk
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