There are several aromatic compounds with the formula c8h9cl. name those that have a trisubstituted ring where the methyl groups are oriented para. if you choose to use ortho, meta, or para in your name, abbreviate these prefixes with o, m, or p. if there are not 3 isomers that fit the description, leave the appropriate number of spaces blank.

An electrons position cannot be known precisely only it's probability of being in a certain location can be known

What are the primary responsibilities of a chemical engineer involved in "r& d"? develop large scale manufacturing operations discover new products and processes training of new chemists determine products needed by consumers

Modern pennies are composed of zinc coated with copper. a student determines the mass of a penny to be 2.482 g and then makes several scratches in the copper coaling (to expose the underlying zinc). the student puts the scratched penny in hydrochloric acid, where the following reaction occurs between the zinc and the hcl (the copper remains undissolved): zn(s) + 2 hcl(aq) → h2(g) + zncl(aq)the student collects the hydrogen produced over water at 25 °c. the collected gas occupies a volume of 0.899 l at a total pressure of 79 j mmhg. calculate the percent zinc (by mass) in the penny. (assume that all the zn in the penny dissolves.)