Click the "draw structure" button to launch the drawing utility, and be sure to answer all parts. Devise a synthesis of the epoxide B from alcohol A. a arrow b A B (Hint: Determine what alkene is needed to make the epoxide, and begin the synthesis with a reaction that yields the needed alkene from an elimination reaction.) a [1] arrow draw structure ... [2] darrow b [3] larrow draw structure ... [1]: POCl3 and pyridine H2SO4 and NaH POCl3 pyridine H2SO4 POCl3 and H2SO4 [2]: pyridine and POCl3 H2O pyridine NaH Br2 and H2O BH3 [3]: pyridine POCl3 POCl3 and pyridine POCl3 and H2SO4 NaH H2SO4 and NaH

in chemistry, a solution’s concentration is how much of a dissolvable substance, known as a solute, is mixed with another substance, called the solvent. the standard formula is c = m/v, where c is the concentration, m is the mass of the solute dissolved, and v is the total volume

acid rain does not usually kill trees directly. instead, it is more likely to weaken the trees by damaging their leaves, limiting the nutrients available to them, or poisoning them with toxic substances slowly released from the soil. the main atmospheric pollutants that affect trees are nitrates and sulphates.

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