A hydrocarbon has an empirical formula CH and a vapour density of 39. Determine its molecular formula.[C = 12, H = 1]

Assessment: JAMB UTME - Chemistry - 2014 Subject: Chemistry

Question 1 Report

A hydrocarbon has an empirical formula CH and a vapour density of 39. Determine its molecular formula.[C = 12, H = 1]
Answer Details
molecular mass = 2 x vapour density
= 2 x 39 = 79
∴ Cn Hn = 78
12n + 1n = 78
13n = 78
n =  78 13  = 6
∴ Cn Hn = C 6H 6
Read lesson note on Kinetic Theory Of Matter And Gas Laws (JAMB)
Read lesson note on Chemistry Of Carbon Compounds (Nigeria Only) (WAEC)
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