Determine the errors present in the given structure below.

Draw the line-angle structure of the following compound.

Give a molecular formula that corresponds to each of the following structures. 

Consider the line-angle structure of the compound 1-isopropyl-4-methylcyclohexane, and answer the following questions:

(a) How many carbons are there in the molecule? 

(b) Identify the marked carbons as 1°, 2°, 3°, or 4°. 

(c) How many hydrogen atoms are at the marked carbon?

Determine the following based on the given line-angle structural formula:

I. total number of carbons;

II. labeled carbon atoms (using a, b, c, etc.);

III. number of hydrogens per carbon; and

IV. hybrid structural formula.

Given the following perspective formula, provide the corresponding line-angle structure.

Change the following models to their corresponding skeletal structures.