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1. Combustion of 5.23 mg of phenol yields 14.67 mg CO2 and 3.01 mg H2O. Phenol contains C, H, and O. What is the percentage of each element in this substance? What is the empirical formula?
2. An oxide of osmium is a pale yellow solid. If 2.86g of the compound contains 2.16g of osmium what is the empirical formula?
A water carbonating plant operates by providing carbon dioxide at 5.0 atm. Estimate the molar concentration of CO2 in carbonated water it produces at 25 ºC.
If the annual production of acetyl salicylic acid in the U.S.A were converted to 5-grain aspirin tablets, approximately how many tablets would there be for each person? Assume that the population is about 3.0 X 10 ^8. Show Calculation
The CO2 output of an astronaut is about 1.2 kg/day. What is the minimum mass of LiOH required for a six-day space shuttle flight involving five astronauts
a scientist discovers a new thermometer which reads temperature in a new unit called the degree gatorg0. careful
What mass of sucrose should be combined with 452 g of water to make a solution with an osmotic pressure of 8.90 atm at 270 K?
Problem- What limitations have you or someone you know encountered in the past in using nonrelational structures (such as in a Microsoft® Excel® or Word file) to store data? What were the advantages?
Problem- The freezing point of a 0.01 m aqueous solution of a nonvolatile electrolyte is -0.072 deg. Celsius. What would you expect the boiling point of this same solution to be. (Kf = 1.86 degrees C, Kb = 0.512 C/m)
Question- Give the line structure of the organic product formed when cyclohexene is reacted with permangate in the presence of base
Calculate the value of E^o cell for the reaction 2Ag(s) + Ca2+ (aq) yields 2Ag+(aq)+Ca(s), using the standard reduction potentials
Write a balanced chemical equation showing the formation of the salt, Na3PO4, from the reaction of the appropriate strong acid and strong base, and name each compound in the equation.
identities of the components in a mixture by Gas chromatography may be determined by the technique called "spiking".
Draw a Data Flow Diagram (DFD) and an ER Diagram depicting a student enrolling in a university, adding, dropping, and finishing a class. Also, include the process of grading and all modular design components (sequence, selection, iteration).
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