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In Which of the Following Pairs of Formulas Do the Two

Question 5

Multiple Choice

In which of the following pairs of formulas do the two members of the pair contain the same number of elements as well as the same number of atoms?

A) Co and CO
B) NaHCO₃ and NaHSO₄
C) SO₃ and SO₂
D) Cl₂CO and C₂HCl

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