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(a) The characteristic odor of pineapple is due to ethyl butyrate, a compound containing carbon, hydrogen, and oxygen. Combustion of 7.23 mg of ethyl butyrate produces 16.43 mg of CO2 and 6.71 mg of H2O. What is the empirical formula of the compound? (Type your answer using the format CO2 for CO2.)
(b) Nicotine, a component of tobacco, is composed of C, H, and N. A 4.725 mg sample of nicotine was combusted, producing 12.818 mg of CO2 and 3.675 mg of H2O. What is the empirical formula for nicotine?
If the substance has a molecular mass of 160 +/- 5 g/mol, what is its molecular formula?
The lowering of vapor pressure is expressed as Raoult's law. An ideal solution obeys Raoult's law. Discuss the reasons why real solutions differ from Raoult's law.
When 1.269 g of this compound (molar mass = 103.67 g/mol) was burned in a bomb calorimeter, the temperature of the calorimeter (including its contents) rose by 6.029 °C. What is the heat capacity (calorimeter constant) of the calorimeter
a manufacturer of bicycles has 4819 wheels 2305 frames and 2250 handlebars. how many wheels are left over? how many
NH3 is a weak base (Kb = 1.8 × 10-5) and so the salt NH4Cl acts as a weak acid. What is the pH of a solution that is 0.041 M in NH4Cl
A hydrocarbon is burned in an excess of oxygen to give 1.32g of carbon dioxide and 0.72g of water. What is the empirical formula of hydrocarbon
State the compositions and relative proportions of the two phases present after a solution initially at thjis mole fraction (0.300) is heated to 394.94.
Assuming equal concentrations, rank these aqueous solutions by their freezing point. SnI4, NaNO3, Al(NO3)3, NaSO4. highest to lowest
what is the minimum atomic radius required for a cubic closest-packed metal to accommodate boron atoms (radius 88 pm) in its octahedral holes?
After four half-lives of U-238 have passed, how much of this sample is in the original sample. 1/2 1/4 1/8 1/16
Questions on chemical equations - Write a balanced equation for this reaction. Include the states of matter for each compound.
A student placed 20.0 g of glucose (C6H12O6) in a volumetric flask, added enough water to dissolve the glucose by swirling, then carefully added additional water until the 100. mL mark on the neck of the flask was reached.
Some chambers used to grow bacteria that thrive on co2 have a gas mixture consisting of 95% co2 and 5% o2 what is the partial pressure of each gas if the total pressure of each gas if the total pressure is 735 mm Hg
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