Chemistry
Give the empirical formula of:
(a) C6H6
(b) C6H18O3
(c) C2H2
(d) CH3COOH
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Answer
(a) Molecular formula is C6H6
∴ Ratio of C and H is 6 : 6
Simple ratio is 1 : 1
Hence, empirical formula = CH
(b) Molecular formula is C6H18O3
∴ Ratio of C, H and O is 6 : 18 : 3
Simple ratio is 2 : 6 : 1
Hence, empirical formula = C2H6O
(c) Molecular formula is C2H2
∴ Ratio of C and H is 2 : 2
Simple ratio is 1 : 1
Hence, empirical formula = CH
(d) Molecular formula is CH3COOH i.e. C2H4O2
∴ Ratio of C, H and O is 2 : 4 : 2
Simple ratio is 1 : 2 : 1
Hence, empirical formula = CH2O
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