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Identify the conjugate base of each of the following compounds: HNO2, HClO, H3PO4, and NH3. Identify the conjugate acid of each of the following species: NH3, ClO2-, SO4^2-, and OH-
An Ice cube tray holds 325 grams of water. If the water initially has a temperature of 25 C, how many kilojoules of heat must be removed to cool and freeze the water 0 C?
The Ka for HF is 3.5 × 10-4. What would you expect the percent ionization to be for the same concentration of hydrochloric acid (HCl)? Explain.
hydrochloric acid for neutralization. A 12.0mL volume of a phosphoric acid solution requires 35.1mL of the sodium hydroxide solution for complete neutralization.
A 1.80-L flask is filled with propane gas (C3H8), at 1.00 atm and -19.4°C. What is the mass of the propane in the flask.
Potassium nitrate decomposes on heating, producing potassium oxide and gaseous nitrogen and oxygen: 4KNO3(s)→ 2K2O(s) + 2N2(g) + 5O2(g)
Which one of the following is not a redox reaction?
In the first step of the trypsin mechanism, the side-chain oxygen of Ser 195 attacks the carbonyl carbon of the substrate. Use PyMOL and your model of the enzyme substrate complex to determine the distance between these two atoms.
PET has a permeability to carbon dioxide of 0.227x10^-13(cm^3 x cm)/(cm^2 x s x Pa) at 25 C. Given that the activation energy for permeability is 27 kJ/mole, at what temperature would the permeability be ten times higher
An organic compound has a molar mass of 150.5 g/mol and contains 11.30% hydrogen atoms by mass. How many hydrogen atoms are in each molecule of this compound?
Using noble gas (n-1) dx representations write the outer electron configuration for the following ions
An air bubble was initially trapped in the buret but was dispensed during the back titration of the unreacted HCI. As a result of this technique error, will the reported amount of antacid in the sample be too high or too low? Explain
Ferrocene cannot be nitrated using the conventional HNO3-H2SO4 mixed acid conditions, even though nitration is an electrophilic
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