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The heat of vaporization of a liquid (ΔHvap) is theenergy required to vaporize 1g of the liquid at its boilingpoint. In one experiment, 60g of liquid nitrogen (boilingpoint -196 degrees Celcius) are poured into a Styrofoam cupcontaining 200g of water at 55.3 degrees Celcius. Calculate the molar heat of vaporization of liquid nitrogen if the final temperature of the water is 41 degrees Celcius.
A box contains 12600 red marbles and 885000 yellow marbles. What sample size is required to reduce the sampling standard deviation of red marbles to 1.85%?
The speed of light in a vacuum is 2.998x10^8 m/s. what is the speed of kilometers per hour. what is the speed in miles per minutes.
calculate the sodium ion concentration in a solution formed by diluting 35.00 mL of a .585 M sodium phosphate solution to a final volume of 145.00 mL
If the volume of ocean water (calculated above) contains 3.7 percent sodium chloride ("salt") by mass and the density of the water is 1.41 g/mL.
The tire is filled with dry air at sea level and a temperature of 60 F to 32 lb/aquare in.standard sea level pressure is 101325 Pa at 0 C (STP).
What is the molarity of your NaOH solution? 2) You are given an impure sample of oxalic acid dihydrate (MW=126.068 g/mole) and asked to determine the percent of oxalic acid dihydrate present in the sample.
Both pieces are placed in a calorimeter whose heat capacity is negligible. What is the final temperature inside the calorimeter (c of copper = .387 J/gK)
In Organic lab we are enabling trans to cis isomerizaton of E-1,2-dibenzoylethylene by irradiating the alkene with UV light. What is the overall equation for this reaction
you decide to use gel filtration. this works brilliantly and you determine that your protein is 80kda at the same time.
A solution of 75.0 g of benzene (C6H6) and 75.0 g of toluene (C7H8) has a total vapor pressure of 80.9 mmHg at 303 K. Another solution of 100.0 g benzene and 50.0 g toluene has a total vapor pressure of 93.9 mmHg at this temperature.
Draw two molecules that are diastereomers and calculate the energy of each. Then draw two molecules that are enantiomers and calculate the energy of each.
A substance with the empirical formula C2HCL (the 2 is a subscript) has the molar mass of 181.44 g/mol. Find the molecular formula of this compound.
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