An optically active alkyne a (c10h14) can be catalytically hydrogenated to butylcyclohexane. treatment of a with c2h5mgbr liberates no gas. catalytic hydrogenation of a over pd/c in the presence of quinoline poison and treatment of the product b with o3 and then h2o2 gives an optically active tricarboxylic acid c8h12o6. (a tricarboxylic acid is a compound with three

Use the table to identify the phase and phase changes of the elements under the given conditions. write the name of the substance, phase, or phase change

The climate of the continental united states is generally 1. tropical 2. temperate 3. arctic 4. highland

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.)