Chemistry Answers

Reaction of 2-methyl-1,3-butadiene with bromine yields a mixture of products: 3,4-

dibromo-2-methyl-1-butene (3 %), 3,4-dibromo-3-methyl-1-butene (21 %) and 1,4-

dibromo-2-methyl-2-butene (76 %).

a) Identify all products as either 1,2 or 1,4 adducts. (3)

b) Propose mechanisms for the formation of all 3 products. (9)

c) Explain why 3,4-dibromo-3-methyl-1-butene (21 %) predominates over 3,4-dibromo-2-

methyl-1-butene (3 %).

I want to vaporize or turn ethanol into a gas, to burn in a fire pit. I it take a propane bottle and pump air into the bottom and have a gas outlet at the top...will it be able to create enough gas to burn as the air moves through the liquid ethanol inside the tank?

What is the mole fraction HCI in an aqueous solution contains 44.2 grams of HCI and 88.6 grams of H2O?

1.   Molarity (M)

Calculate the molar concentration of a solution containing 13.4 g potassium hydroxide KOH in 355 mL of solution.

 Fe₂O₃ + 3CO  --> 2Fe +  3CO₂, how many grams of iron are produced when 7.47 grams of iron(III) oxide are reacted?

Write the structures of d- and l-mannose in open-chain form

A biochemist who is studying the properties of certain sulfur S-containing compounds in the body wonders whether trace amounts of another nonmetallic elements might have similar behavior. To which element should she turn her attention?

(a)F (b)As (c)Se (d)Cr (e)p

Which two of these elements would you expect to show the greatest similarity in chemical and physical properties: B,Ca,He,Mg,P?

Using the spdf notation,write the electron configuration of iodine?

A sample of 0.846 mol Ne gas at 18°C has a volume of 18.5 L under a pressure of 1.09 atm. The gas is then compressed to 10.5 L at 18°C. Calculate the final pressure.