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A compound contains only carbon, hydrogen, and oxygen. Combustion of 0.01068 g of the compound yields 0.01601 g of CO2 and 0.00437 g of H2O. The molar mass of the compound is 176.1 g. What are the empirical and molecular formulas of the compound?
If 100.0J of energy are added to 25.0g of water at 50 degrees celcius,what will the final temperature of the water be?
The vapor pressure for methanol and ethanol at 50 C is 406 and 222 Torr, respectively. Calculate the total vapor pressure of a mixture at 50 C that contains 0.2 mol of methanol and 0.1 mol of ethanol.
Draw the structure of Caffeine. Skeletal form only. Locate 2 bonds in the molecule that are obviously polar covalent.
The temperature of the H 2 O is 26.55 degree celsius. Determine how much heat is evolved per gram of fuel burned?
A distance of 200 ft must be taped in a manner to ensure a standard deviation smaller than ± 0.03 ft. What must be the standard deviation per 100 ft tape length to achieve the desired precision?
What mass of AlCl3 can be formed from 5.000 mol NiCl2 and 2.000 mol Al?
The combustion of an organic compound releases 35.6 kJ of energy and causes the temperature of a constant volume calorimeter to increase by 4.76 °C .
Regiochemistry and stereochemistry in diels-alder reactions, How does one predict which regioisomer forms as the major product when more than one product can form? How does the dienophile affect the stereochemistry of the product?
A soluation of HO-CH2-CH2-OH is prepared by dissolving 651g of ethylene gylcol in 1.50kg of water. Determine the freezing point of the soluaiton and the vapor pressure of water above the solution 25.0 degrees C.
Suppose that 347 mL of argon is collected over water at 25 ?C and 715 torr. Compute the volume of the dry argon at STP. The water partial pressure at 25 ?C is 23.8 torr.Answer in units of mL
A 93-L sample of dry air cools from 145 degrees celicus to -22 degrees celicus while the pressure is maintained at 2.85 atm. What is the final volume?
The density of aluminum is 2.70 g/cm3 and the density of chromium is 7.19 g/cm'.If equal masses of aluminum and chromium are transferred to equal volumes of water in separate graduated cylinders.
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