Calculate the formula mass of sodium oxide ( Na2O )

Explanation

(i) `underset("Ethanoic acid")(H-underset(H)underset(|)overset(H)overset(|)C-overset(O)overset(||)C-OH)`
(ii) `underset("Bromopentane")(H-underset(H)underset(|)overset(H)overset(|)C-underset(H)underset(|)overset(H)overset(|)C-underset(H)underset(|)overset(H)overset(|)C-underset(H)underset(|)overset(H)overset(|)C-underset(H)underset(|)overset(H)overset(|)C-Br)`
(iii) `underset("Butanone")(H-underset(H)underset(|)overset(H)overset(|)C-underset(H)underset(|)overset(H)overset(|)C-overset(O)overset(||)-underset(H)underset(|)overset(H)overset(|)C-H)`
(iv) `underset("Hexanal")(H-underset(H)underset(|)overset(H)overset(|)C-underset(H)underset(|)overset(H)overset(|)C-underset(H)underset(|)overset(H)overset(|)C-underset(H)underset(|)overset(H)overset(|)C-underset(H)underset(|)overset(H)overset(|)C-overset(O)overset(||)C-H)`
Yes, structural isomers are possible for bromopentane.