Compounds P and Q are consecutive members of the alkane homologous series. Q has one more carbon atom than P.
One molecule of P and one molecule of Q contain 55 atoms in total.
Alkanes have the general formula CnH2n+2\mathrm{C}_{n}\mathrm{H}_{2n+2}CnH2n+2.
Relative atomic mass (ArA_rAr): C = 12.0 H = 1.0
Calculate the relative formula mass of Q.
Show your working.
131 exam-style questions on OCR GCSE Chemistry 6.2 Organic chemistry, covering 6.2.1 Crude oil and fractional distillation, 6.2.2 Cracking and dependence on hydrocarbons, 6.2.3 Functional groups and homologous series, 6.2.4 Reactions of alkanes, alkenes and alcohols, 6.2.5 Addition polymerisation and repeat units, 6.2.6 Naturally occurring polymers, 6.2.7 Chemical cells and fuel cells, and 6.2.8 Condensation polymerisation and how to make one. Each one has a worked solution and a mark scheme showing where the marks go.