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How many grams of aluminum oxide are produced by the complete reaction of 22.4 g aluminum with excess oxygen?
What is the volume in mL of 0.466 M HCl(aq) needed to reach halfway to the equivalence (stoichiometric) point in the titration of 49.6 mL of 0.789 M trimethylamine (Kb = 6.5 x 10-5).
Calculate the molar enthalpy of combustion of Phosphorous when this combustion process was carried out under the constant pressure?
calculate the molar mass of a sample if a simgle molecule weighs 8.90 x 10-23
Calculate the time to drain water at 20C from a vertical tank 1.7 m in radius from a depth of 13 m to 1.6 m through a 1 cm in radius pipe 12 m long connected vertically at the bottom of the tank. Take η = 1 cP where 1P = 1 g/(cm s)
What volume of O2 is needed to react completely with 20.9L of H2 to give H2O if all gases are measured at 25 degrees C and 1atm? The Balanced equation is: 2H2+O2 ----> 2H2O
To determine the freezing points of distilled water, 1m glucose, 1m NaCl, 1m CaCl2. Use the freezing point of the pure water as a baseline to determine deltaTf for each of the solutions
Hydroiodic acid reduces chlorine to hydrochloric acid and iodine. Enter a balanced net ionic equation for the reaction.
Using triethylamine with alkyl halides such as iodoethane, 1-bromopropane, 2-bromopropane, describe how steric hindrance affects the rate of an Sn2 reactions. Use specific chemical examples to support the conclusion
What is the hybridization and bond angles of Acetone. And sktech the atomic and atomic hybrid orbitals that overlap to form the sigma and pi bonds.
What is the hydronium-ion concentration of a 0.40 M solution of HCN (Ka= 4.9×10-10) at 25° C?
A student mixes 175.0 grams of water at 62.31oC in a coffee-cup calorimeter with 175.0 grams of water at 25.84oC. The final temperature of the mixture is 41.71oC.
The normal melting point of benzene is 5.5 degrees Celsius . For the process of freezing, what is the sign for each of the following: a) Delta Hsys b) Delta Ssys c) Delta Gsys at 5.5 degrees Celsius d) Delta Gsys at 0 degrees Celsius
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