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When a 41.7 g sample of an unknown compound is dissolved in 500 g of benzene, the freezing point of the resulting solution is 3.77 degrees C. The freezing point of pure benzene is 5.48 degrees C and Kf for benzene is 5.12 degrees C/m. Calculate the molar mass of the unknown compound.
If an automobile is able to travel 246 on 10.6 of gasoline, what is the gas mileage in ?
a) What is the mo;ar mass of the gas b) If the unknown gas is composed of 2.78 g of carbon and the rest is hydrogen, what is its molecular formula
Finding Number of Atoms in a Molecule from Molecular Weight, As determined from the gas law, the molecular weight of a substance is eight times the atomic weight
Calculate the heat energy released when 29.0 g of liquid mercury at 25.00 C is converted to solid mercury at its melting point
A 235mL solution is prepared with 41.8 millimoles of an unknown sodium salt of a deprotonated organic acid (NaX). If the solution has a pH of 8.05, what is the pKa of the acid?
The half-life of a certain radioactive element is 1,250 years. What percent of the atoms remain after 7,500 years?
An aliquot of 14.045 grams of this solution is titrated with 0.1043 M hydrochloric acid (HCl.) and it required hydrochloric acid (HCl solution) of 29.18 mL to reach the methyl red endpoint. Compute the weight % Ammonia (NH3) in the aqueous waste.
Cabernet Sauvignon with a pH of 3.64. How many times more acidic is the Sauvignon Blanc? Please show work thoroughly and answer both questions.
Let's say that you are given a 0.215g of unknown weak acid and asked to dilute with 75 mL of DI water. You then use a standardized 0.125 M NaOH to titrate the unknown acid solution
Calculate how many grams of phosphorus are present in 2.68 moles of phosphorus pentachloride(PCl5) and also determine the numbers of moles of chlorine are present in 3.71 grams of phosphorus pentachloride?
How would the stereochemical outcome of the bromination reaction differed if we would have started with cis-cinnamic acid
Tetraphosphorus decaoxide reacts with water to form phosphoric acid, a major industrial acid. In the laboratory, the oxide is used as a drying agent.
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