The chemical compound that is called CH2 is a hydrocarbon. One can learn more about this chemical compound at popular on the web sources such as Chymist.
It is 1 fluoropentane.
diethylamine
CH2CH2CH2CH2CH2CH2CH2 is an impossible compound formula.CH3CH2CH2CH2CH2CH2CH3 however is called n-heptane (with CH3 at both endings)
methyl propyl ether
Potassium oxide (K2O) is made from the combination of potassium with oxygen. There is no specific chemical compound made from potassium, oxygen, CH2, and CH3.
The compound CH3CH2CH2CH2OH is called butanol. It is a four-carbon alcohol with the OH functional group attached to the fourth carbon atom in the chain.
Ethyl propyl ether. The formula should be correctly written as CH3-CH2-O-CH2-CH2-CH3 Note the use of capitals, particularly for Hydrogen (H) , not 'h'.
The compound CH2=CH-CH=CH2 when reacts with HBr gives 1,4 addition product, CH3-CH=CH-CH2Br
No such compound because the 2nd C from the left has only 2 bonds, and it needs to have 4 bonds. If you mean H3C --CH2--CH2--CH3, then this compound is n-butane.
CH3-CH2-CH2-CH=CH2 will be names as 1-pentene or pent-1-ene
The compound CH3-CH2-CH2-CH2-CH2-CH2-CHO is an aldehyde with a straight-chain structure. It consists of a seven-carbon chain (heptanal) with an aldehyde functional group (-CHO) at one end. Therefore, the correct IUPAC name for this compound is heptanal.
Ethylbromide is the name of the compound CH3-CH2-Br.