Please people I need an answer a, b,c, d,e. Name the following alkanes? Please!

a. 2 - Methylpropane

b. 2 - Methylbutane

c. 4 - Ethylheptane

d. 3 - Ethyl - 4 - Methylheptane

e. 3 - Ethyl - 3 - Methylheptane

Explanation:

a. 2 - Methylpropane - As the structure has 3 carbon atoms and one methyl group at second carbon.

b. 2 - Methylbutane: Numbering for longest carbon chain has 4 carbon atoms and methyl group attached at second carbon atom.

c. 4 - Ethylheptane: Numbering from right to left or left to right, longest chain has 7 carbon atoms (heptane) and two carbon atoms (ethyl) attached at fourth carbon atom.

d. 3 - Ethyl - 4 - Methylheptane: Numbering from right to left, longest chain has 7 carbon atoms (heptane), two carbon atoms (ethyl) attached at forth carbon atom and one methyl group attached at fourth carbon atom.

e. 3 - Ethyl - 5 - Methylheptane: numbering from left to right, longest chain has 7 carbon atoms (heptane), two carbon atoms (ethyl) attached at third carbon atom and one methyl group attached at fifth carbon atom.

i can ! i just need to know what the paragraph is! : p

water at room temperature is flowing through a pipe with pressure taps located 10 ft apart along one section of the pipe, which are connected to a mercury (s=13.6) manometer.