Chemistry
(a) Draw the structural formula for the following.
(1) Isobutane
(2) Propanal
(3) But-2-yne
(b) Name the following organic compounds in IUPAC system.

Organic Chemistry
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Answer
(a) Structural formulae are shown below:
(1) Isobutane

(2) Propanal

(3) But-2-yne

(b) IUPAC names of the organic compounds are:
(1) But-1-ene
(2) 1-bromo 2, 3-dichloropropane
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