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To find the pKa of X-281, you prepare a 0.075 M test solution of X-281. The pH of the solution is determined to be 3.00. What is the of X-281?
Determine the characteristic wavelengths if an electron are accelerated through an electric potential to a kinetic energy of 18kev.
Compute the number of moles - As we know many volatile substances are present in Earth's atmosphere in trace amounts.
The average radius of a molecule of lyzosome, an enzyme in tears, is 1430 pm. What is it's radius in nanometers.
When C2H5OH +3O2 produces 2CO2 + 3H2O,determine how many grams of oxygen gas are essential for complete combustion of 421grams of ethanol ?
calculate that how many liters of carbon monoxide gas, measured under the same conditions, is essential?
A certain pesticide is fatal to fish fingerlings at a level of 0.5 parts per million in water. A leaking metal can containing 10.0 kg of the pesticide was dumped into a stream with a flow of 10.0 Liters per second moving at 0.7 km/hr.
Lead thiocyanate, rm Pb(SCN)_2, has a K_sp value of 2.00 times 10^{-5}.Calculate the molar solubility of lead thiocyanate in 1.00 it M rm KSCN.
A swimming pool contains 88,000 liters of water and it having a surface area of 5 meters by 10 meters. It is observed that when this swimming pool is heated by the Sun for six hours.
Calculate the wavelength of the photon emitted when the hydrogen atom undergoes a transition from n = 5 to n = 3. (R = 1.096776 × 107 m-1).
Calculate the pH at the equivalence point in a titration between 10.00 mL of acetic acid(0.100 mol/L) and sodium hydroxide (0.100 mol/L).
What unusual aspect of water is responsible for it unique characteristics as both a liquid and as a solid? Give examples of how this property of water would affect food systems during processing.
Calculate the heat required to raise the temperature of 125 g of water are heated from 20.0oC to 100oC based on a specific heat of water of 4.184 J/g oC.
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