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What is the molar mass of a nonpolar molecular compound if 5.52 grams dissolved in 36.0 grams of benzene begins to freeze at -1.87 °C? The freezing point of pure benzene is 5.50 °C and the freezing point depression constant, Kfp, is -5.12 °C/m.
Sodium methoxide reaction: Pipet 1.65 mL of a 25% (by weight) solution of sodium methoxide in methanol into a 10 mL reaction flask.
the half life increased from 2.0 min to 4.0 min at 25C. Calculate the the order of the reaction and the rate constant.
A feed stream containing a mixture of 40% n-butane, 30% n-pentane and 30% n-hexane flows into a flash unit. The flash temperature is 290 K and the flash pressure is 0.6 bar
At least how many standard solutions would you need to make calibration graph, assuming that the graph is expected to be a straight line? Explain your answer. Do not include the data from distilled water
A student heated 1.0L of ethanol (density 0.789 g/L) with 1.0 mL ethanoic acid (density 1.049 g/mL) with a sulfiric acid catalyst and noticed a vinegar-like smell to the product as well as a fruity medicinal smell.
125 mL of H_2O is initially at room temperature (22.0C). A chilled steel rod at 2.0C is placed in the water. If the final temperature of the system is 21.5C, what is the mass of the steel bar?
Explain why the addition of the HCl or NaOH improves the ability of the azo dyes
A solution of 2.00 g of para-dichlorobenzene (a clothes moth repellant) in 50.0 g of cyclohexane freezes at 1.05 C. What is the molar mass of
Is there an analytical technique we could employ to verify that the camphor is also racemic? What type of instrument would you use? What kind of results would you expect from a racemic product?
nitric acid is usually purchased in concentrated form with a 70.3% HNO3 concentration by mass and a density of 1.14% g/ml. How much of the concentrated stock solution in milliliters should you use to make 2.5L of 0.500 M HNO3.
in a sodium borohydride reduction experiment explain any color changes observed when sodium borohydride was added.
what is the vapor pressure of the solution at 20 °C? Values at 20 degress celsius
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