Inside SC190's Unit 9 organic structure exercise, functional groups are drawn, named and tied to properties, from ethanol and dimethyl ether to acetaminophen and ibuprofen. Searches like "sc 190 unit 9 assignment example", "sc190 unit 9 sample" and "sc190 unit 9 example" land here.
What a finished SC190 Unit 9 organic structure exercise looks like
Three blocks, each a set of drawn structures with answers alongside. The first works isomers of C2H6O, ethanol with its hydroxyl group and dimethyl ether with its C-O-C linkage, drawn in condensed and skeletal form, and explains the gap between boiling points of 78 and -24 degrees Celsius through hydrogen bonding that only the alcohol can do. The second names and draws simple molecules by IUPAC rules: 2-propanol, butanoic acid, ethyl ethanoate, ethanamine and propanone, each with its functional group circled and classified. The third takes two familiar structures. Acetaminophen, C8H9NO2, carries a phenol hydroxyl and an amide; ibuprofen, C13H18O2, carries a carboxylic acid on a largely hydrocarbon frame. For each group the exercise states one property it changes, such as ibuprofen's poor water solubility traced to that large nonpolar region.
How a SC190 Unit 9 example is structured
A short key opens the exercise with the functional groups the unit covers, alcohol, ether, aldehyde, ketone, carboxylic acid, ester, amine and amide, each shown as a general structure with its characteristic atoms highlighted. Items then progress from recognizing a group to naming a molecule to reasoning about a property, so the hardest work comes last. Every structure is drawn with all atoms accounted for, and the first few skeletal drawings carry a hydrogen count at each carbon to show the convention is understood. Names follow a stated order: the longest chain containing the group, numbered from the end nearest it, then the suffix. Property explanations are kept to two sentences, one naming the structural feature and one naming the intermolecular force or reaction it controls, which keeps the reasoning visible and short.
Same formula, different group
Ethanol and dimethyl ether open the exercise because they isolate the effect of a functional group: identical atoms, one hydroxyl, and boiling points about 100 degrees apart.
Every carbon at four bonds
Drawings are checked atom by atom, and the first skeletal structures carry explicit hydrogen counts so a grader can see that no carbon was left with three bonds or five.
Names built from the chain outward
Each IUPAC name is shown with its parent chain highlighted and numbering marked, so ethyl ethanoate and butanoic acid read as derivations rather than recalled labels.
Groups found in real molecules
Acetaminophen and ibuprofen have their groups circled and named, including the amide that is easy to mislabel as an amine because both put nitrogen beside carbon.
A property named for every group
Hydroxyl groups add hydrogen bonding, a carboxylic acid adds an ionizable site, a long hydrocarbon region lowers water solubility. Each claim is tied to a drawn feature.
Where marks go in SC190 Unit 9
Carbons drawn with the wrong number of bonds cost more than anything else, since every property argument collapses when the structure itself is impossible. Misidentified groups come next: esters called ethers, amides called amines, ketones and aldehydes confused because the position of the carbonyl was not checked. Names lose credit when numbering starts from the wrong end, when the suffix names a group that is not the highest priority, or when the ester is named backward, ethanoate before ethyl. Property statements that assert without a feature, ethanol called more soluble with no mention of hydrogen bonding, earn only part of the reasoning marks. Molecular formulas that fail to match the drawn structure, and skeletal drawings with hydrogens shown on some carbons and omitted on others, round out what graders take off.
Get a SC190 Unit 9 example written to your instructions
List the structures and questions set in your SC190 Unit 9 prompt, any required drawing style, skeletal or condensed, and the rubric. Every molecule is drawn with each atom accounted for, named where names are requested, and linked to one property per functional group. Generally delivered in 24-48h, a first exercise is free of charge.
SC190 Unit 9 questions, answered
How can I tell an amide from an amine?
Look at the carbon next to the nitrogen. In an amide, that carbon is also double-bonded to an oxygen, forming a carbonyl, as in acetaminophen. In an amine, the nitrogen is attached only to carbons or hydrogens with no carbonyl beside it. The carbonyl changes behavior significantly: amides are far less basic than amines.
Why does ethanol boil so much higher than dimethyl ether?
Ethanol's hydroxyl group lets its molecules hydrogen bond to one another, and breaking those attractions takes energy. Dimethyl ether has an oxygen but no hydrogen attached to it, so its molecules cannot hydrogen bond with each other. Same atoms, same mass, and a boiling point difference of about 100 degrees, which is why exercises use the pair.
Do I need to name complex molecules like ibuprofen?
Usually not. Most Unit 9 prompts ask for IUPAC names only on small molecules and ask for functional groups to be identified in larger ones. Ibuprofen's systematic name is long, and graders rarely expect it. What they do expect is each group located correctly and its effect on properties explained in a sentence.