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Problem- The hydrogen in interstellar space near a star is largely ionized by the high-energy photons from the star. Such regions are called "H II regions." Calculate the longest wavelength of light that is able to ionize a ground state hydrogen atom.
Please answer only if you are 100% confident
Question- Use the Henderson-Hasselbalch equation to calculate the pH of a buffer solution that is 0.28M in formic acid (HCO2H) and 0.52M in sodium formate (HCO2Na).
Calculate the work, heat, energy and enthalpy change upon: a) expansion by 3.3 L at p=const (isobaric). b) isothermal expansion by 3.3. L against a constant external pressure of 30.0 kPa c) reversible isothermal expansion by 3.3 L.
Rank the following atoms (from smallest to largest) based on which would have the largest second ionization energy?
Problem- If SRP's (reduction potential--E) correlate strongly with IE3 (third ionization energy) explain this trend-
A solution containing an unknown concentration of the acid is titrated with NaOh . It requires 20.65mL of 0.3000 M NaOh solution to titrate both acidic protons in 45.00mL of the tartaric acid solution
a solution is 40 acetic acid by mass. the density of this solution is 1.049 gml. calculate the mass of pure acetic acid
a fixed quantity of gas at 21 exhibits a pressure of 730 and occupies a volume of 4.40. use boyles law to calculate the
Explain what is the temperature at which the solution of KI will boil if the solution contains 126.15 g of KI dissolved in 350.9 grams of water. Kb of water is 0.512 C/m
What volume of 0.455 M KOH must be diluted with water to prepare 2.50 L of a solution having a pH of 12.50
Imagine that the gas shown in the simulation is an ideal gas such as helium. Notice that the final number of moles of gas is 1.00 mol for each experimental run.
Solid lead (I) sulfide reacts with aqueous hydrochloric acid to form solid lead (II) chloride and dihydrogen sulfide gas.
You are about to perform a reaction that requires 1.25 mol of CaCl2 to go to completion. The solution available in the stock room has a concentration of 33 % w/v. How many mL of this solution will you need to use? A. 46 mL B. 420 mL C. 0.034 mL D...
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