Chemical Formula Flashcard

Front

What is a compound?

Back

A compound is a substance formed when two or more different elements are chemically bonded together. For example, CO2 (carbon dioxide) is a compound made of carbon and oxygen.

Front

What is the chemical formula for water?

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The chemical formula for water is H2O, which indicates it contains two hydrogen atoms and one oxygen atom.

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 present in the molecule. For example, in H2O, the '2' indicates there are two hydrogen atoms.

Front

Is O2 a compound or an element?

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O2 is an element because it consists of two atoms of the same element (oxygen) bonded together.

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What is the difference between an element and a compound?

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An element is a pure substance that cannot be broken down into simpler substances, while a compound is made up of two or more different elements chemically combined.

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What is the chemical formula for sulfuric acid?

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The chemical formula for sulfuric acid is H2SO4, which contains two hydrogen atoms, one sulfur atom, and four oxygen atoms.

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How can you identify if a substance is a compound?

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A substance is a compound if it can be broken down into simpler substances (elements) through chemical reactions and has a fixed ratio of elements.

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What does it mean if two substances have the same number of carbon atoms?

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It means that in their chemical formulas, the number of carbon (C) atoms is identical, which can affect their chemical properties.

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What is the significance of chemical formulas in chemistry?

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Chemical formulas provide a way to represent the composition of a substance, indicating the types and numbers of atoms present.

Front

What is the formula for a substance containing three hydrogen atoms, one sulfur atom, and four oxygen atoms?

Back

The formula is H2SO4, which is sulfuric acid.