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Under what conditions can an electron be boosted to a higher energy level, i.e. to an electron shell further from the nucleus? What could happen to this excited electron? If the electron is not captured by some other atom/molecule, what happens when the electron returns to a lower energy level?
How many mL of concentrated HCl (At 25C is 36.46 g/mol), should be diluted to prepare 25.0L of a solution that has a pH of 1.20
How much heat is released when 50.0 grams of water at 100 degree celcius hits the skin and cools to a body temperature of 37 degree celcius.
The boiling point of ethanol is 78°C. How much heat is required to heat 100 grams of ethanol from 25°C to its boiling point and then to turn it into a vapor
A 10.0 mL solution of 0.300 M NH3 is titrated with a 0.100 M HCl solution. Calculate the pH after the addition of 20.0 mL of the HCl solution.
An argon ion laser which operates at 488.2 nm is used to excite the tagged proteins and observe fluorescence. A 5 µM solution gives a signal of 0.852 relative fluorescence units. What is the wave number of the laser light at 488.2 nm?
Provide one complete series of sample calculations to show how you determined the concentration of the HCl unknown. Calculate the average concentration of the HCl solution.
Air bags are activated when a severe impact causes a steel ball to compress a spring and electrically ignite a detonator cap. This causes sodium azide (NaN3) to decompose explosively according to the following reaction.
While preparing oxalate buffer technician by mistake added 0.1 M of CaC2O4. (pKsp = 7.9) to 0.2 M solution of oxalic acid
how many metric tons of 5-s coal would be needed to yield the h2so4 required to produce a 3.0-cm rainfall of ph 2.00
explain why all the solutions iron iii nitrate and potassium thiocyanate used in this experiment were made in 0.1 m
A 4.82-L sample of carbon monoxide is collected at 55°C and 0.833 atm. What volume will the gas occupy at 1.05 atm and 25°C?
what concentration of Ba(OH)2 solution is left after complete precipitation of BaS. What is the mass of BaS Precipitated
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