Name the following:

CH3CH2CH(OH)COOH
CH3OCH2CH2CH3
C4H9O(C=O)CH3

How closely do you need to follow IUPAC guidelines?

I would name the last one as
n-butylacetate but the guidelines probably say n-butylethanoate.
The middle one is an ether.
n-methylpropyl ether.
The first one is an acid with a hydroxy group on the alpha carbon atom.

The names of the given compounds are as follows:

1. CH3CH2CH(OH)COOH -> This compound is an organic acid and is commonly known as propanoic acid.

To name this compound, you can break it down into functional groups. The "COOH" at the end tells us that it is a carboxylic acid. The rest of the compound is a chain of three carbon atoms with an hydroxyl group (-OH) attached to the second carbon.

By numbering the carbon atoms in the chain and assigning the appropriate prefix to indicate the number of carbon atoms, we can name the compound as propanoic acid.

2. CH3OCH2CH2CH3 -> This compound is an ether and is commonly known as ethyl methyl ether.

To name this compound, we look at the groups attached to the oxygen atom. There is a methyl group (-CH3) and an ethyl group (-CH2CH3).

To name ethers, we list the alkyl groups attached to the oxygen in alphabetical order, followed by the term "ether." In this case, methyl comes before ethyl alphabetically, so the complete name of the compound is ethyl methyl ether.

3. C4H9O(C=O)CH3 -> This compound is an ester and is commonly known as butyl acetate.

To name this compound, we first identify the ester functional group, which is the C=O (carbonyl) group attached to an oxygen atom. The alkyl group attached to the oxygen is a methyl group (-CH3).

To name esters, we take the name of the alkyl group attached to the oxygen and add it as a prefix, followed by the name of the parent carboxylic acid, which in this case is butanoic acid. So, combining the names, we get butyl acetate as the name of the compound.