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What should the solubility of a compound be in a solvent it is to be recrystalized from? (Hint you will want to look at solubility vs. temperature)?
An object has a mass of 50.0g. When it is dropped into a graduated cylinder containing 15mL of water, the water level in the cylinder rises to 32mL.
A compound contains 44.26% carbon atoms, ,3.69% hydrogen atoms, and 7.79% fluorine atoms by mass. Each molecule of this compound contains one fluorine atom. What is the total number of carbon, hydrogen, and fluorine atoms in one molecule of this c..
what is the volume change when 2 kg of water at 6.8 MPa and 93 Celsius expands to 1.6 bar
Calculate the pH of a buffer that contains 0.060M ammonium chloride
Calculate the pH of rainwater in equilibrium with SO2 in a polluted air mass for which the sulfur dioxide concentration is 1.0 ppm.
What will be the new freezing point of a solution made from 30.0g of a nonelectrolyte solute and 400g of water? ( the molar mass of the solute is 72.0g)
Potable water (drinking water) should not have manganese concentrations in excess of 0.05 mg/mL. If the manganese concentration is greater than 0.1 mg/mL, it imparts a foul taste to the water and discolors laundry and porcelain surfaces.
What was the concentration of the unknown HClO4 solution? The neutralization reaction is: HClO4(aq)+NaOH(aq)==>H2O(l)+NaClO4(aq)
Why is the intercept of a calibration curve of absorbance vs concentration not zero?
describe the observations you would make and write a net ionic equation for any reaction that would occur.
chemiluminescence reaction will actually occur very slowly in air. What component of air will bring about this reaction and what is its approximate concentration in air?
Aluminum will react with bromine to form aluminum bromide (Al2Br6). How many moles of Al are needed to form 28.0 mol of Al2Br6?
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