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Substituents on an aromatic ring can have several effects on electrophilic aromatic substitution reactions. Substituents can activate or deactivate the ring to substitution, donate or withdraw electrons inductively, donate or withdraw electrons through resonance, and direct substitution either to the ortho/para or to the meta positions. From the following lists, select the substituents that have the indicated property. The substituents are written as -XY, where X is the atom directly bound to the aromatic ring. activation of the ring towards substituion ___ -Cl ___ -NHCOCH3 ___ -OCOCH3 ___-SO3H withdrawl of electrons through resonance ___ -COOH ___ -OCH3 ___ - OH ___ -CN ortho-para directed substituion ___ -Cl ___ -NO2 ___ -NCOCH3 ___ -COOH ___ -CH3
Given stock solutions of glucose (1M), asparagine (100 mM), and NaH2PO4 (50 mM), how much of each solution would you need to prepare 500 mL
Calculate the density of a block.
How much heat is required to warm 221 g of ice from -44.9°C to 0.0°C, melt the ice, warm the water from 0.0°C to 100.0°C, boil the water, and heat the steam to 173.0°C?
The initial mass of the the crude ether was 141 mg. The mass after recrystallization was 121 mg. Calculate the percent recovery from recrystallization.
If I add 1.65L to 112g of sodium acetate what is the molality of sodium acetate in the solution
A biochemist is trying to purify the enzyme hexokinase from a bacterium that normally grows in the Arctic Ocean at 5C. In the next lab
At room temperature (about 20degree C) milk turms sour in about 64 hours. In a refrigerator at 3 degree C, milk can be stored for about three times as long before turning sour.
14 g of Si reacts with 16 g of O to produce SiO2, the only product, with no reactant left over. How much SiO2 would be produced from 34 g of Si and excess O?
Write the reaction and predict the major organic products(s) for each of the following reactions. Make sure to consider stereochemistry & regiochemistry, if applicable.
A system comprised of chloroform, 1,4-dioxane, and ethanol exists as a two-phase vapor/liquid system at 50 degrees C and 55 kPa.
The concentration of each gas once equilibrium is reached. The new equilibrium concentrations if the volume is suddenly halved (still at 298K)
If a gas is collected over water at 30.0oC in a 50.0 ml container and the pressure of the "wet" gas is found to be 645 torr, what would the pressure of the "dry" gas be in the same container and temp.
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