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The freezing point of ethanol (C2H5OH) is ?114.6°C. The molal freezing point depression constant for ethanol is 2.00°C/m. What is the freezing point (°C) of a solution prepare bydissolving 50.0 g of glycerin (C3H8O3, a nonelectrolyte) in 200 g of ethanol?
Problem- A certain gas is present in a 11.0L cylinder at 2.0atm pressure. If the pressure is increased to 4.0atm the volume of the gas decreases to 5.5L . Find the two constants ki, the initial value of k, and kf, the final value of k, to verify w..
A nonvolatile organic compound Z was used to make up two solutions, Solution A contains 5.00 g of Z dissolved in 100 g of water, and Solution B contains 2.31 g of Z dissolved in 100 g of benzene.
Our reaction mixture had an oily layer layer on top when we added 3M sulfuric acid. what would cause this
How many additional milliliters of titrant are needed to reach the first equivalence point of quinidine dihydrochloride. What is the pH at the first equivalent point
What is the pH during the titration of 25.00mL of 0.10M NH3 (Kb = 1.8 x 10-5) after the addition of 10.00mL of 0.10M HCl titrant?
A radio station's channel, such as 100.7 FM or 92.3 FM, is actually its frequency in megahertz ({\rm MHz}), where 1\; {\rm MHz}=10^6\; {\rm Hz}. Calculate the broadcast wavelength of the radio station 102.7 FM
Calculate the cell potential after the reaction has operated long enough for the [Al3+] to have changed by 0.40 mol/L. (Assume T = 25°C.)
Tooth enamel is mainly hydroxyapatite. If 1.150g of tooth enamel reacts with hydrochloric acid to give 1.231g of calcium chloride, what is the percentage of hydroxyapatite in the tooth enamel sample
could 131 g of xe gas in a vessel of 1.00 dm3 exert a pressure of 20.0 atm at 25 c if it behaved as a perfect gas? if
Milk of magnesia, a suspension of Mg(OH)2 in water, reacts with stomach acid (HCl) in a neutralization reaction.
You have 4 ml of a 0.35 M solution. You take 50 µl of the solution, and add 8 ml of water. How many ‘fold' have you diluted the solution. What is the concentration of the diluted solution
A spoonful of sodium chloride is dissolved in a liter of water. What is sodium chloride in this solution?
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