Calculate the percentage, by mass, of carbon in cyclohexane. Give your answer to two significant figures.
formua of cyclohexane C6H12
molar ratio is 1:2 (divide 6 and 12 by 6 )
to get mass ratio multiply by molar mass (1 x 12 and 2x1)
12:2
convert to percentage (12/14 = 6/7 = 85.7% carbon by mass )
TF
Related Chemistry A Level answers
All answers ▸Without a catalyst, an alkene will react with bromine while benzene will not. Why is this?
What is the C-O-H bond angle in propan-2-ol and why is this? [4 marks]
Calculate the concentration, in mol dm-3, of a solution of chloric (I) acid, HOCl , which has a pH of 4.23. Chloric acid is a weak acid, with Ka = 3.72 x 10^-8
Explain why bromine reacts more readily with phenol than benzene