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Summarize the effects histamines can have on the body.What is the purpose of an antihistamine?Give at least 2 examples of an antihistamine.What functional groups are present?What are the benefits and dangers of using them?
Problem- What is the freezing point of 0.100 M NaNO3(aq)? The freezing point depression constant of H2O is 1.86o C/m A. 0.186 oC B. -0.186oC C. 0.372 oC D. -0.372oC E. 18.6oC
What two products form when you react Furfural with cyclopentanone (OH- on top of arrow and -H2O on bottom of reaction arrow). One has the molecular weight of 162.2 and melting point 60.5
The rate of SN2 of tert-butyl bromide is faster in polar aprotic solvents than in polar protic solvents. Why? a. polar aprotic lower the potential energy of the product.
Determine the molarity of a solution of sodium hydroxide (NaOH) if 27.9 mL of this solution combines exactly with 22.30 mL of 0.253 M
Depict the mechanism for the synthesis of 4-methylcyclohexene from 4- methylcyclohexanol utilizing phosphoric acid and sulfuric acid as catalysts. Make sure to comprise all steps and curved arrows for all electron movements.
solution made from 6.50g of an unknown compound in 27.8g of diphenyl has a molality of .195m. Calculate the molar mass of the unknown.
A 350 mL air sample collected at 35 degrees C has a pressure of 550. mmHg. What pressure will the air exert if it is allowed to expand to 425 mL at 57 degrees C?
the overall dissociation of tartaric acidh2c4h4o6 isrepresented below. the overall dissociation constant is
The solubility product of PbBr2 is 8.9x10^-6. Determine the molar solubility a) in pure water, b) in 0.20M KBr solution, c) in 0.20M Pb(NO3)2 solution.
Identify the limiting reagent for the given combination of reactants. Calculate how many grams of whatever substance will be in excess and how many grams of HF will be made.
The company is interested in the drug's Ka value because only the dissociated form of the chemical is active in preventing cholesterol buildup in arteries. To find the pKa of X-281, you prepare a 0.089M test solution of X-281. The pH of the soluti..
Why must all the lines in the hydrogen spectrum between 2500 A and 7000 A belong to the Balmer series
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