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How can endothermic reactions be at equilibrium if the forward reaction has a higher activation energy than the reverse reaction, thus having different rates?
Explain what is the pH of a 0.05 M solution of TRIS acid (pka = 8.3)
the structures of atoms, what bonds are and how they are made, the periodic table as far as how to understand electrons and know how many in each element. Electronegativities and polar/ non polar bonds, hydrogen bonds.
The partial pressure of CO2 inside a bottle of soft drink is 4.0 atm at 25°C. The solubility of CO2 is 0.12 mol/L. When the bottle is opened, the partial pressure drops to 3.0 * 10-4 atm. What is the solubility of CO2 in the open drink? Express yo..
Calculate the heat required to raise the temperature of 125 g of water are heated from 20.0oC to 100oC based on a specific heat of water of 4.184 J/g oC.
Solutions need to have the ionization constants compared
A 100.-L flask contains a mixture of methane (CH4) and argon at 25C. The mass of argon present is 228 g and the mole fraction of methane in the mixture is 0.650.
From each pair of compounds, circle the one with the indicated characteristic. Explain your choice. more basic: 4-nitroaniline or 4-methoxyaniline
100g of orange juice is said to contain about 50mg of ascorbic acid. How much of a 2E-4M DCPIP titrant should be required to titate a 100g sample. What would be a good sample size.
An iron chloride compound contains 55.85 grams of iron and 106.5 grams of chlorine. What is the most likely empirical formula for this compound
Problem- A 5-MGD surface water supply is treated with conventional filtration followed by chlorine disinfection. The chlorine dose is controlled to be less than 2 mg/L to avoid total trihalomethane (a disinfection by-product, or DBP) problems. The..
What is the molarity of a solution obtained when a mass of 23.6 g of calcium chloride is diluted to a volume of 250 mL in a volumetric flask? The molarity is ___x10^___ M.
A 0.2527-g sample of a mixture of Mg(OH)2 and Al(OH)3 was treated with 50.00 mL of 0.225 mol L?1 HCl(aq). The resulting solution required 13.73 mL of 0.176 mol L?1 NaOH(aq) to neutralize the excess, unreacted HCl. What was the percentage by mass o..
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