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What mass of oxygen (in grams) reacts when 14.2 g of ethanol (CH3CH2OH) are combusted in oxygen to produce carbon dioxide and water?
If a message from flight control requires 170 sec to reach a satellite, how far in kilometers is the satellite from Earth?
Calculate [Cr^3+] in eequilibrium with Cr(OH)4- when 0.010 mol of Cr(NO3)3 is dissolved in a liter of solution buffered at pH 10.0
A mixture of acetone and toluene is boiled at 60 C and at 760 mm Hg. What is the ratio of acetone to toluene in the vapor phase?
A 0.4647-g sample of a compound known to contain only carbon, hydrogen, and oxygen was burned in oxygen to yield 0.8635 g of CO2 and 0.1767 g of H2O.
Describe the development of the modern periodic table. Include contributions made by Lavoisier, Newlands, Mendeleev, and Moseley.
What is the molarity of the NaBr produced when 50.0 ml of 4.80 M NaOh is mixed with 150.0 ml of 160 M HBr?
The total pressure of the mixture is 1.42 atm. What is the partial pressure of O2 in the mixture? (A) 0.211 atm (B) 0.426 atm
How does the entropy of the system PbI2(s) + H2O(l) change as PbI2(s) dissolves in water at 25°C?
One of the nobles gase of group was isolated in 1894 by allowing a large volume of air to react with magnesium so that the only noble gas, contaiminated with tracs of other noble gases,
How many nucleotides are needed to code for a polypeptide with eleven amino acids
Calculate the radiation dosage (in grays) for an 57-kg person that is exposed for 3.0 seconds to a 3.0 Ci source of beta radiation.
Will the temperature decrease shift the equilibrium toward the reactants or products for a reaction characterized by a positive reaction enthalpy and positive reaction entropy?
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