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Pure ethanol boils at 78°C, but an ethanol solution containing glycerol (condensed formula: CH2(OH)CH(OH)CH2(OH)) does not. If 4.66 g of glycerol has been dissolved in 125 g of ethanol:
a. What is the molality of the solution?
b. At what temperature does the solution begin to boil? (Kb = 1.22°C /m)
The normal melting point of benzene is 5.5 degrees Celsius . For the process of freezing, what is the sign for each of the following
Calculate the change in temperature for 4.5g of CaCl2 dissolved in 90.0mL of H20. Assume that calorimeter absorbs no heat. (Ccal=0)
Exactly 500 cubic centimeters of a gas at 1 atmosphere and 0 degrees Celsius weighs 0.581 grams. The composition of the gas shows it to be composed of only carbon and hydrogen, the carbon being 92.24%. What is the molecular formula of this gas
The reference electrode is attached to the positive terminal of the potentiometer, and the silver electrode is attached to the negative terminal. The solubility constant of TlBr is Ksp = 3.6 × 10-6 and the solubility constant of AgBr is Ksp = 5.0 ..
A gas sample has an original volume of 700 ml when collected at 750 mm and 25°C. What will be the volume of the gas sample if the pressure increases to 810 mm and the temperature increases to 30°C?
Write a chemical equation for Ca(OH)_2 (aq) showing how it is an acid or a base according to the Arrhenius definition.
a gas sample has an original volume of 700 ml when collected at 750 mm and 25degc. what will be the volume of the gas
As a food chemist for a major potato chip company, you are responsible for determining the salt content of new potato chips products for the packaging label.
Net ionic equations to describe the formation of precipitate when soda ash (Na2CO3) is added to hard water
The molecule, atracurium, is a very complex drug. Atracurium exhibits a very short half-life (20-min). The products of the fastest inactivation process are shown. Define what mechanism is responsible for the formation of the products.
Define the reaction is second order in C4H6. Suppose the rate constant is 4.0 x 10^-2 M^-1s^-1, and the initial concentration of C4H6 is 0.080 M, Define how long will it take the concentration of C4H6 to reach 0.400M. Also how long are the 1st and..
hydronium ion concentration using henderson-hasselbalch equation.1. what is the hydronium ion concentration of a
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