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What are the Literature Wavelength values (nm) of the Helium spectrum ?
This flask is then connected to a second flask, which is evacuated and has a volume of 630. mL. The gas is subsequently allowed to fill both flasks. What is the final pressure of the gas in the first flask? What is the final pressure of the gas in..
An aqueous solution containing 34.1 g of an unknown molecular (nonelectrolyte) compound in 141.3 g of water was found to have a freezing point of -1.5 degrees C. Calculate the molar mass of the unknown compound.
A sample of cerium-141 for a diagnostic test was dissolved in saline solution to an activity of 4.5 millicuries/mL. If the patient undergoing the test needs a dose of 10 millicuries
Given that the partition coefficient for a solute is K in a water-ether solvent extraction system, is it more effective to do one extraction with V mL of ether or three extractions with V/3 mL of ether
You are a laboratory assistant for your chemistry course. There are 250 students in the course, and each needs to use 25 mL of a 0.15 M solution of copper sulfate.
A sample containing 4.80 g of O2 gas has a volume of 15.0 L. Pressure and temperature remain constant. What is the new volume if 0.500 moles of O2 gas is added?
Suppose that a fully charged lead-acid battery contains 1.50 of 5.00 . What will be the concentration of in the battery after 2.50 of current is drawn from the battery for 8.50
Problem- A 5-MGD surface water supply is treated with conventional filtration followed by chlorine disinfection. The chlorine dose is controlled to be less than 2 mg/L to avoid total trihalomethane (a disinfection by-product, or DBP) problems. The..
When a solution of copper(II) sulfate is mixed with a solution of sodium carbonate, a precipitate forms. Write each of the following equations for the reaction between copper(II) sulfate and sodium carbonate.
If 18.4 mL of 0.800 M HCl solution are needed to neutralize 5.00 rm mL of a household ammonia solution, what is the molar concentration of the ammonia?
what is the relationship between vapor pressure atmospheric pressure and the boiling point of a
A magnesium strip is reacted with hydrochloric acid yielding 26.8ml of hydrogen gas. hydrogen gas was collected over water at temp of 27 degres celsius and under a total pressure of 765 mmhg. calculate the mass of the magesium strip
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