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When 1.150 grams of an unknown nonelectrolyte dissolves in 10.0 grams of water, the solution freezes at -2.16°C. What is the molecular weight of the unknown compound? Kf for water = 1.86°C/m. i) 88.6 g/mol
ii) 116 g/mol
iii) 74.2 g/mol
iv) 99.1 g/mol
v) 132 g/mol
Beakers W, X, Y, and Z contain either aqueous NaOH, KOH, LiOH, or NH4OH. Which beaker contains aqueous ammonia if the light bulb glows brightly when testing the conductivity of beakers W, X, and Z
sketch flow diagram amp explain the extraction process.1. what is the purpose of extracting the organic layer with
If the melting point of the compound is unknown the melting point measurement could take an exceedingly long time if the rate of heating of 2C/min is followed over the entire range from room temperature to the melting.
On average, what percentage of random rolls of three (3) regular playing dice should result in a combined value of 5
when a gold nugget with a mass of 521 g is added to 50.0 ml of water the water level rises to 77 ml what is the density of gold
What is the mass of the product after the reaction between 250 mg of trans-cinnamic acid and 0.6 g of pyridinium bromide perbromide with 5% of impurities in 6 mL of acetic acid. Yield is 90%
When doing the Recrystallization of benzoic acid. Is it better to use just water as the solvent or with methanol and water as a solvent pair. Why and what are the differences
If all of the below solutions are 0.5M in each of the compounds, what is the concentration (M) of each ion in solution
A gaseous mixture of and contains 37.8 nitrogen by mass. What is the partial pressure of oxygen in the mixture if the total pressure is 785 ?
Ammonia can be made by reacting calcium cyanamide (CaCN2) with water as shown: CaCN2 + 3 H2O => CaCO3 + 2 NH3. How many grams of water are required to react with 212.9 g of calcium cyanamide
Calculate the pH of a solution containing an amphetamine concentration of 200 mg/L. Express your answer to one decimal place.
Determine the molar concentration of Na+ in a solution in which 6.315+/-0.004g of Na3PO4 has been added to 1000.0+/-0.4mL
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