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Question: What is the charge-to-mass ratio of an ionized hydrogen atom (proton)? Of doubly ionized helium? Would it be difficult to distinguish hydrogen from helium by their charge-to-mass ratios?
State the mass balance and charge balance equations for a solution that is .45 M in NaF as well as saturated with CaF2
When 0.250 grams of a polymer were dissolved in 22.9 mL of benzene at 21.6 degrees C, the osmotic pressure was found to be 0.044 atm. Calculate the molar mass of the protein.
How long will it take for 20% of the U-238 atoms in a sample of U-238 to decay. If a sample of U-238 initially contained 1.4×1018 atoms when the universe was formed 13.8 billion years ago, how many U-238 atoms will it contain today
If 95.0 mg of fluorine-18 is shipped at 8:00 a.m., how many milligrams of the radioisotope are still active if the sample arrives at the radiology laboratory at 1:30 p.m.
If a weak acid, HA, is 3% dissociated in a 0.25 M solution, calculate the Ka and pH of the solution.
Question- Two equivalents of ethyllithium are necessay in order to react with one equivalent of acetic acid in order to produce on equivalent of 2-butanone. Why are two equivalents of ethyllithium necessary. what is the other organic product in th..
How many theoretical plates does the column have What is the plate height (in mm) of the column if the column is 11.7 cm long
Explain how is the concept of effective nuclear charge used to simplify the numerous electron-electron repulsions in a many-electron atom
The N atoms in the pyridine are opposite each other in the ring with 2 carbons between them in either direction. Indicate resonance with a double headed arrow between the structures. Draw the Lewis structures with the formal charges minimized.
Light of wavelength 540 nm is incidenct on a slit of width 0.150, and a diffraction pattern is produced on a screen that is 2.00 from the slit. What is the width of the central bright fringe
Joe makes up a 0.1M solution of Potassium Fluoride. He uses a pH meter to test the pH of the solution. What is the most reasonable value he would find?
What is the name of a device used to measure gas pressure? What is the molar mass of a gas if 372.0 mL has a mass of 0.800 g at 99.8°C and 106.6 kPa?
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