B) ethane has the formula c2h6. in terms of electronic structure,
explain why there is a single covalent bond between the two carbon atoms.

There is one single covalent bond between two carbon atoms.

Explanation:

We know that sharing of electrons form covalent bonds.

If we look upon K,L,M ,N shells of the carbon and hydrogen atoms.

We found that Hydrogen is having only   electron in K shell.

And Carbon on the other hand is having electrons in K shell and electrons in L shell.

So carbon have   valence electrons,and it can share bonds with any relevant atom to complete its octet.

And Hydrogen requires   electron to complete its doublet.

Alkane general formula

For ethane

Carbon atom is shared by   Hydrogen.

The remaining one electron of carbon will be shared with another carbon atom.

An image of the sharing of electrons attached below,

Hence we have only   covalent bond between the two.

a saline water is fed to a reverse osmosis unit at flow rate o rotameter connected to reject (retentate) line reads 8 installed in reject and permeate line reads 15.2 milli siemens/cm and 300 micro siemens/com respectively.

here is table 2-2:

country

percent of eligible voters that voted

rank

united states

44.9%

138

canada

60.1%

107

costa rica

84.6%

14

hungary

66.9%

82

japan

57.0%

118

egypt

27.7%

159

south africa

85.5%

10

ans is no, the data set cannot be plotted as a single circle graph