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Pick 10 polyatomic ions. Depict Lewis structures for each. Include important resonance forms with formal charges.
What mass of potassium bromide residue remains if 500.0 mL of 0.200 M potassium bromide solution are evaporated to dryness?
The final temperature of the uranium as well as deuterium mixture is 28.5 degrees Celsius. Specified the desities of the uranium (19.05) g/cm3) and heavy water (1.11 g/mL). Compute the edge length of the piece of cubic uranium.
Co(H2O)62+(aq)+4Cl?(aq), which interconverts the blue CoCl42? ion and the pink Co(H2O)62+ ion. Will the equilibrium concentration of CoCl42? increase or decrease when the following changes occur?
The half -life of 14C is 5730 years. A sample taken for radiocarbon dating was found to contain 56 percent of its original 14C. What was the age of the sample? (*Hint: The decay follows first order kinetics).
A liquid has a H vaporization of 35.5kJ/mol and a boiling point 0f 122 degrees celcius at 1.00 atm.What is its vapour pressure at 109 degrees celcius.
When 1 of a fuel is burned at constant pressure, it produces 3452 of heat and does 13 of work. What is the value of delta H for the combustion of the fuel?
the final step in the mechanism for the base promoted hydrolysis (saponification) of an ester is a deprotonation of a carboxylic acid by sodium hydroxide to give a carboxylate salt (RCO2Na)
If the energy needed to raise the temperature of the water to 28.1 C is obtained from the combustion of methane (CH4), what volume of methane, measured at STP must be burned
Using the following balanced reaction , how many mol of water are formed if 5.20 mol of Fe (OH)3 react completely. 2Fe (OH)3 +3H2SO4 --> 6H2O +Fe2(SO4)3
When diborane (B2H6) dissociates in either solvents, such as tetrahydrofuran (THF), a complex between borane (BH3) and the ether is formed. (a) In the Lewis sense, what is the function of BH3 as it forms the complex? Explain.
A .5647 sample of a compound known to contain merely carbon, hydrogen and oxygen was found in oxygen to yield .8635 g of CO2 and .1767 g of H20. Explain what is the empirical formula of the compound
A mixture of gases contains 1.35 g of N2, 2.64 g of H2, and 2.38 g of NH3. If the total pressure of the mixture is 1.64 atm, what is the partial pressure of each component. PN2 atm PH2 atm PNH3 atm
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