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Calculate the standard entropy change for the combustion of ethanol at 25 degrees C. CH3CH2OH(l)+3O2(g)----> 2CO2(g)+3H2O(g). Species S degrees CH3CH2OH(l) 160.7 O2(g) 204.1 CO2 213.7 H2O(g) 188.8
If the enthalpy change for the reaction is 20 kJ/mol and the entropy change is 50 J/mol/K, the conversion of reactants to products is spontaneous above 400 K.
Explain why in an aqueous electrochemical cell, nitrate ions never react at the anode, but nitrite ions do
Consider this reaction involving an unknown element X. When 1.800 g of XBr reacts, 0.6758 g of Br2 is produced.
The reported values for one compound (CaHbOc) were as follows: mass: 214.1360 g/mol; percent C and H: 84.07 and 8.47, respectively. Determine the molecular formula of the compound.
Draw the following molecule and its ring flipped conformer in the chair conformation on a sheet of paper: trans-1-chloro-2-methylcyclohexane
In a solution of glucose and water, if 4.5% of the mass is glucose, how many grams of the solution contain 2.25 g glucose ?
Sodium bromate is used in a mixture which dissolves gold from its ores. Calculate the mass in grams of 4.68 mol of sodium bromate.
The mass percent of water in a hydrate of MnCl2 is 36.41%. What is the empirical formula of the hydrate
If there are 0.640 g of NaCl left in a beaker that originally contained 75.0 mL of saltwater, what must have been the molar concentration of the original solution? The molar mass of NaCl is 58.44 g/mol.
Proceeds at a certain temperature until the partial pressures of H2O, H2, and O2 reach 0.0800 atm, 0.00500 atm, and 0.00200 atm respectively.
When butane (C4H10) reacts with oxygen, ... carbon dioxide and water are produced. The balanced equation for this reaction is
Compounds are always composed of two or more elements. Atoms of different elements are different. Isotopes have the same number of protons but a different number of neutrons.
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