Chemical Formulas

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What is a chemical formula?

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A chemical formula is a way of expressing the composition of a substance using symbols for its constituent elements and numbers to indicate the quantity of each element.

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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 present in one molecule of the compound.

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What is the chemical formula for water?

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H₂O, which consists of 2 hydrogen atoms and 1 oxygen atom.

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Front

What is the chemical formula for sulfuric acid?

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H₂SO₄, which consists of 2 hydrogen atoms, 1 sulfur atom, and 4 oxygen atoms.

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Front

What is the chemical formula for glucose?

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C₆H₁₂O₆, which consists of 6 carbon atoms, 12 hydrogen atoms, and 6 oxygen atoms.

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What element does the symbol 'Au' represent?

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Gold.

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How many total atoms are in one molecule of KNO₃?

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5 atoms (1 potassium, 1 nitrogen, and 3 oxygen).

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Front

What is the significance of the chemical formula in chemistry?

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It provides essential information about the types and numbers of atoms in a molecule, which helps in understanding its properties and reactions.

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Front

What does the formula C₁₂H₂₂O₁₁ represent?

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Sucrose, a type of sugar composed of 12 carbon atoms, 22 hydrogen atoms, and 11 oxygen atoms.

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Front

What is the difference between an element and a compound?

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An element is a pure substance made of only one type of atom, while a compound is a substance formed when two or more different types of atoms bond together.