Ernie's Page: Problems-On-The-Fly

Problem Answer

C₆H₄(COOCH₃)₂

There are 10 atoms of carbon in the molecule represented by this formula. As additional practice for this skill, take note that there are 10 atoms of hydrogen.

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Reading A Formula

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Background

Most students learn to read simple chemical formulas in elementary science class, nevertheless there are some issues related to the reading of complex formulas that merit review. Specifically, this problem page reviews the issues associated with parentheses in formulas.

To remove parentheses, multipy the subscript outside the parentheses be each atom subscript inside the parenteses: Al₂(SO₄)₃ thus translates to Al = 2, S = (1X3); O = (4X3) or Al₂S₃O₁₂.

Problem

How many atoms of carbon are represented by the following formula?

C₆H₄(COOCH₃)₂

Problem Answer

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Reading A Formula

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Problem

"Will you walk into my parlour?" said the Spider to the Fly,
"'Tis the prettiest little parlour that ever you did spy..."
Mary Howitt-1834

Problem Answer

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Reading A Formula

Background

Problem

"Will you walk into my parlour?" said the Spider to the Fly,"'Tis the prettiest little parlour that ever you did spy..."Mary Howitt-1834

"Will you walk into my parlour?" said the Spider to the Fly,
"'Tis the prettiest little parlour that ever you did spy..."
Mary Howitt-1834