When 3-bromocyclopentene is treated with HBr, the observed product is a racemic mixture of trans-1,2-dibromocyclopentane. None of the corresponding cis-dibromide is observed. Propose a mechanism that accounts for the observed stereochemical outcome.

Complete the following reactions using word and balanced equations including states. dilute phosphoric acid is added with a calcium hydroxide solution.

Find the mass in grams of 1.37x1020 particles of h3po4

Why is the bond angle in a water molecule less than the bond angle of methane? a. the central oxygen atom in water has two lone pairs of electrons, whereas the central carbon atom in methane has no lone pairs. b. the central hydrogen atom in water has one lone pair of electrons, whereas the central carbon atom in methane has two lone pairs. c. the central oxygen atom in water has four lone pairs of electrons, whereas the central carbon atom in methane has only one lone pair. d. the central oxygen atom exerts more repulsive force on surrounding atoms than the central carbon atom in methane does. reset next