A petrochemical plant uses two alkanes, P and Q, as feedstocks.
Alkane P has a relative formula mass of 310.
Alkane Q contains five fewer carbon atoms than alkane P.
Relative atomic mass (ArA_rAr): C = 12.0 H = 1.0
Calculate the molecular formula of alkane 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.