4Formulae Chemical EquationsMedium1 markWhich equation describes the complete combustion of an alkene, CnH2n?ACnH2n+2nO2→nCO2+nH2OBCnH2n+2nO2→nCO2+2nH2OCCnH2n+1.5nO2→nCO2+2nH2ODCnH2n+1.5nO2→nCO2+nH2OGrade answerSolutionGrading criteria