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Given the reaction CH4+2O2-->CO2+2H2O, what amount of oxygen is needed to completely react with 1 mol of CH4?
An unknown monoprotic weak acid, HA, has a molar mass of 55.0. A solution contains 2.50 g of HA dissolved 800. mL of solution. The solution has a pH of 2.000. What is the value of Ka for HA
Calculate the pH of 1.00 L of a buffer that is 0.130 M HNO2 and 0.190 M NaNO2. What is the pH of the same buffer after the addition of 1.00 mL of 12.0 M HCl. (pKa of HNO2 = 3.40)
What are the rules for when the molecule goes through the chloronium ion or not. For example a cyclopentane with a double bond. One of the double bonded carbons is bonded to a methyl group.
Problem- Calculate the standard entropy change for the decomposition of solid calcium carbonate into solid calcium oxide into solid magnesium and oxygen gas.
a solution of 22.0g cacl2 in 100.0 cm3 of water has a vapor pressure of 22.8 torr at 26 celsius. why does this result
A 5.00 L flask at 279 K contains a mixture of He and O2 with a total pressure of 1.00 atm. If the mole fraction of O2 is 0.40, what is the mass fraction of O2?
A mixture of two miscible solvents that may be used as the solvent for a recrystallization experiment would be which of the following
Problem- Why is the protonation of carboxylic acid happening on lone pair electrons of carbonyl oxygen (C=O) instead of OH group, even oxygen of OH has lone pair electrons
A lake has a pH of 8 and the total molar concentration of nitrogen species (NH3 and NH4+) is 7.1×10-4 mol/L. what is the percentage of aqueous NH3 in the lake
a plant manufacturing nails and screws uses a large pool volume 10000 l to collect and treat its residual waste water
Identify which sets of quantum numbers are valid for an electron. Each set is ordered (n,\ell,m_\ell,m_s).
How many grams of sodium formate, NaCHO2, would have to be dissolved in 1.1 L of 0.20 M formic acid (pKa 3.74) to make the solution a buffer for pH 3.82
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