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Methyl Salicylate, C8H8O3 , the odorous constituent of Oil of Wintergreen, has a vapor pressure of 1.00 torr at 54.3 degrees Celsius and 10.0 tor at 95.3 degrees celsius.
a.What is the Vapor Pressure at 25oC? Hint: What variable must be computed from the above data to compute the new pressure at the new temperature?
b.What is the minimum number of liters of air that must pass over a sample of the compound at 25oC to vaporize 1.0 mg of it? Hint: You know the Vapor Pressure from question "a" above and you are given the temperature and mass. What relationship can be used to compute Volume?
How many grams of nickel nitrate, Ni(NO3)2, must be dissolved to prepare 200 mL of a 0.152 M aqueous solution of the salt.
How much heat energy, in kilojoules, is required to convert 61.0 g of ice at -18.0 C to water at 25.0 C ?
A patient needs 2.70×10^-2 of a sulfa drug. There are 8.00 tablets in stock. How many tablets should be given?
What do understand by the terms a) Empirical Formula b) isomerism and what conclusions can you draw from the following observations about the chemical nature of the organic liquid D?
How much water must be added to 488 mL of 0.223 M HCl to produce a 0.134 M solution?
When 0.78 g of an unknown gas in contained solely in a 560 mL container, the pressure is 780 Torr at 5 degrees Celcius. What is the molar mass of the gas in grams/mole?
a pound of coffee beans yields 70 cups of coffee (4cups=1qt) how many milliliters of coffee can be obtained from 1 g of coffee beans
Compute the number of moles - As we know many volatile substances are present in Earth's atmosphere in trace amounts.
Consider a distillation column that is fed 1000 kg/hr of an equimolar mixture of benzene and cyclohexane. Theof the benzene distillate stream is to contain 90 % with a benzene mole fraction of 0.95.
calculate how many liters of seawater are needed to produce 79.1 L of fresh water at 20 °C with an applied pressure of 50.0 bar.
If 348 grams of K2SO4 (molar mass 174 grams) is dissolved in enough water to make 500 milliliters of solution, what are the concentrations of the potassium and sulfate ions.
In fermentation of glucose, 780 mL of CO2 gas was produced at 37 degrees C and 1.00 atm. What is the volume(L) of the gas when measured at 22 degrees C and 675 mmHg?
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