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What's in a cigarette?

In the box next to the name of the chemical, put the letter of the description you think best fits.

Definition Your Answer Substance
(a) Acetone
(b) Ammonia
(c) Benzene
(d) Carbon monoxide
(e) Cyanide
(f) Formaldehyde
(g) Hydrogen cyanide
(h) Lead
(i) Nicotine
(j) Tar
(k) Vinyl chloride