July 30, 2014

Posts by bb

Total # Posts: 105

How to distingush organic layer and aqueous layer? The organic layer is the one on top. Most organic solvents are less dense than water. (NOte: Non-hydrocarbons such as chloroform, methylene chloride, carbon tetrachloride etc are more dense than water.)

please help me unscramble this word hippayen Try these: =)

chemistry gas laws
In a science demonstration, 4 to 6 plastic garbage bags are arranged under a 2 m by 2 m piece of plywood. A volunteer stands on the plywood and others blow into the bags to "levitate" the volunteer. If four bags are used and a 140 lb person is on the plywood, what is...

Does it take energy for polymerization reasctions to proceed or ddo they occur spontaneoulsly?? Why or why not?? 10. From a bottle of molten nutrient agar you need to pour 20 agar plates each containing 50 mg ml-1 ampicillin. E...

permutations and combinations
Four men and four women are to be seated alternatively at a round table. In how many ways can this be done?

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