Compound j, c16h16br2, is optically active. on treatment with strong base, compounds k and l (each c16h14) are formed; k and l each absorb only 2 equivalents of hydrogen when reduced over a pd/c catalyst. compound k reacts with ozone to give phenylacetic acid (c6h5ch2cooh), while similar treatment of l gives 2 products. one product, m, is an aldehyde with formula c7h6o; the other product is glyoxal (cho)2. draw the structure of compound m.

Is this a scientific model? use complete sentences to explain why or why not. a graphic organizer showing the water cycle i need : ( asap i go it never mind

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.)

Now look at the segment of the graph between the two data points marked with black squares. describe how the boiling point and melting point plots behave between these points. be as specific as possible.