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What is a chemical formula?

Back

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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NGSS.MS-PS1-1

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What does the subscript in a chemical formula indicate?

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The subscript indicates the number of atoms of the element in one molecule of the compound.

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How many atoms are in the chemical formula H₂O?

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There are 3 atoms in H₂O (2 hydrogen and 1 oxygen).

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What is the chemical formula for sulfuric acid?

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The chemical formula for sulfuric acid is H₂SO₄.

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How many different elements are in the chemical formula C₆H₁₂O₆?

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There are 3 different elements in C₆H₁₂O₆: carbon (C), hydrogen (H), and oxygen (O).

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NGSS.MS-PS1-1

Front

What is the total number of atoms in one molecule of water (H₂O)?

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There are 3 atoms in one molecule of water (2 hydrogen and 1 oxygen).

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NGSS.MS-PS1-1

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What is the chemical formula for potassium nitrate?

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The chemical formula for potassium nitrate is KNO₃.

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How many oxygen atoms are in the chemical formula H₂SO₄?

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There are 4 oxygen atoms in H₂SO₄.

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NGSS.MS-PS1-1

Front

What does the term 'molecule' refer to in chemistry?

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A molecule is a group of two or more atoms bonded together, representing the smallest fundamental unit of a chemical compound.

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NGSS.MS-PS1-1

Front

What is the significance of the chemical formula in understanding a substance?

Back

The chemical formula provides information about the types and numbers of atoms in a substance, which helps in understanding its properties and reactions.

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