Chapter 12A.1, Problem 2P

What is the mass of the molecular ion formed from compounds having each molecular formula: (a) ${\text{C}}_{\text{3}}{\text{H}}_{\text{6}}\text{O}$;(b) ${\text{C}}_{\text{10}}{\text{H}}_{\text{20}}$;(c) ${\text{C}}_{\text{8}}{\text{H}}_{\text{8}}{\text{O}}_{\text{2}}$;(d) methamphetamine $\left({\text{C}}_{\text{10}}{\text{H}}_{\text{15}}\text{N}\right)$?