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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?
A white solid, soluble in water and alcohol but not in toluene, does not melt when heated to 250°C. However, upon prolonged heating of the solid a colorless gas evolves and the amount of solid "shrinks". The solid appears in the list of pure subst..
a proton in a linear accelerator has a de broglie wavelength of 144 rm pm. what is the speed of the
H2 reacts according to the following equation representing the synthesis pf ammonia gas: N2(g) + 3H2(g)--> 2NH3 If 1 Liter of H2 is consumed, what volume of ammonia will be produced at constant temperature and pressure
A current of 5.80A passes through a CrNO3(2) soln for 1.70 hours. How much chromium is plated out of the soln
Question- How many grams of silver sulfate can be dissolved in 450. ml of .200M sodium sulfate solution? (ksp for Ag2SO4 is 1.2* 10^-5)
determine the gram formula mass of the compound
Student performed a Kjeldahl nitrogen analysis of a protein sample. The subsequent weight % nitrogen values were determined: 15.5, 13.7, 15.7, 15.4 and 15.8. Explain what is the value of G computed for the Grubbs test. Must the outlier be rejected..
Our simple pH meter that we have used before works on the principles deiscussed on page 829. What cell voltage would you expect from the pH probe if it is place into a beaker containing 50 mL of 1M HCl diluted with 50 mL of distilled water
As a technician in a large pharmaceutical research firm, you need to produce 200. of 1.00 potassium phosphate solution of = 7.26. The of is 7.21. You have 2.00 of 1.00 solution and 1.50 of 1.00 solution, as well as a carboy of pure distilled . How..
Problem- An open flask sitting in a lab fridge looks empty, but we know that actually it is filled with a mixture of gases called air. If the flask volume is 3.50 L, and the air is at standard temperature and pressure, how many gaseous molecules d..
Predict and sketch the likely splitting patterns and relative integrations for them most downfield resonance(s) in the proton NMR spectra of both primary alcohols below. Explain why the two patterns are different.
A new potential heart medicine, code-named X-281, is being tested by a pharmaceutical company, Pharma-pill. As a research technician at Pharma-pill
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