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A particular reaction is spontaneous at 450K. The enthalpy change for the reaction is 34.5 kJ. What can you conclude about the sign and magnitude of the standard entropy change for the reaction?
The element is so highly unstable that no observations of its properties have been possible. Based on its position in the periodic table, propose two different reasonable valence electron configurations for this element.
The normal boiling point of hydroquinone is 310°C. Calculate the pressure at which hydroquinone will boil at 200°C given that its Hvap is 73.38 kJ/mol.
Nitrogen gas may react with hydrogen gas to form hydrazine gas, N2H4, according to the reaction N2 + 2 H2 ---> N2H4. 10 L of N and 25 L H react to completion (the limiting reagent is converted entirely to hydrazine).
Many household cleaning products contain oxalic acid, H2C2O4, a diprotic acid with the following dissociation constants
a carnot cycle uses 1.00 mol of a monatomic perfect gas as the working substance from an initial state of 10.0 atm and
Excitation of the 3s electron from Mg+ to a 3p orbital occurs at 280.0 nm. The probability of filling a 3p orbital relative to the 3s orbital is 3/1. Assuming that the total Mg+ population in a given atomization source is 3.5 x 10^18 ions at any g..
Calculate the pH of a solution that is 0.295 M in sodium formate (NaHCO2) and 0.205 M in formic acid (HCO2H). the Ka of formic acid is 1.77x10^-4.
calculate the amount of heat required to completely sublime 51.0 g of solid dry ice co2 at its sublimation temperature.
Name two amino acids that are mostly positively charged at neutral pH. A Lysine and arginine B Histidine and arginine C Cysteine
Are the following components most accurately described as cofactors, coenzymes, or neither? Fe2+, FAD, metal ion, CoQ, Lipase, Biotin
What volume of 3.50M H2S is required to react with excess O2 to produce enough NH3 to fill a cylinder that is 50ft long and has a diameter of 13 ft at a pressure of 450 torr and 20?F?
How many moles of oxygen are consumed in burning 1.60 moles of benzene, C6H6?
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