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4. The molecular formulas of some substances are as follows. Write their empirical formulas. a. acetylene, C2H2(used in welding torches) b. glucose, C6H12O6 (the simplest sugar) c. octane, C8h18 (a component of gasoline)

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Explanation

Empirical formula: the empirical formula of a chemical compound is the simplest whole-number ratio of atoms present in a compound.

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The empirical formulas for the next formulas:

a) C2H2 (ratio 2:2) (acetylene) => CH (ratio 1:1)

b) C6H12O6 (ratio 6:12:6) (glucosa) => CH2O (ratio 1:2:1)

c) C8H18 (ratio 8:18) (octane) => C4H9 (ratio 4:9)

Answer:

a. CH

b. CH2O

c. C4H9

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