Chemical Formulas

Front

What is a chemical formula?

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A chemical formula is a way of expressing information about the proportions of atoms that constitute a particular chemical compound or molecule.

Front

What does the subscript in a chemical formula indicate?

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The subscript in a chemical formula indicates the number of atoms of the element that are present in the molecule.

Front

How do you determine the total number of atoms in a chemical formula?

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To determine the total number of atoms in a chemical formula, add up all the subscripts for each element present in the formula.

Front

What is the chemical formula for propane?

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C₃H₈

Front

How many oxygen atoms are in the sulfate ion (SO₄) in Al₂SO₄?

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4

Front

In the chemical formula H₂SO₄, how many hydrogen atoms are present?

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2

Front

What is the significance of the coefficients in a chemical formula?

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Coefficients indicate the number of molecules or moles of a substance in a chemical reaction.

Front

How many different elements are present in the chemical formula C₂H₂ClK₃?

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4 (Carbon, Hydrogen, Chlorine, and Potassium).

Front

What is the chemical formula for sulfuric acid?

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H₂SO₄

Front

How many sulfur atoms are in one molecule of H₂SO₄?

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1