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 chemical compound using symbols for the elements and numbers to indicate the quantity of each element.

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NGSS.MS-PS1-1

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What does H2O represent?

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H2O represents water, which consists of two hydrogen atoms and one oxygen atom.

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NGSS.MS-PS1-1

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How many atoms are in the formula H2SO4?

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H2SO4 contains 7 atoms: 2 hydrogen (H), 1 sulfur (S), and 4 oxygen (O) atoms.

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NGSS.MS-PS1-1

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What is the significance of subscripts in a chemical formula?

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Subscripts indicate the number of atoms of each element in a molecule. For example, in H2O, the '2' indicates there are two hydrogen atoms.

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What is the chemical formula for hydrogen peroxide?

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The chemical formula for hydrogen peroxide is H2O2.

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How many different elements are in the formula CH3CH2Br?

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There are 3 different elements in CH3CH2Br: carbon (C), hydrogen (H), and bromine (Br).

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NGSS.MS-PS1-1

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What is the formula for ammonium hydroxide?

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The formula for ammonium hydroxide is NH4OH.

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How many hydrogen atoms are in the formula C2H6?

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There are 6 hydrogen atoms in the formula C2H6.

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NGSS.MS-PS1-1

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What does the formula CH3CHO represent?

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The formula CH3CHO represents acetaldehyde, which contains 2 carbon atoms, 4 hydrogen atoms, and 1 oxygen atom.

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NGSS.MS-PS1-1

Front

What is the chemical formula for sulfuric acid?

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The chemical formula for sulfuric acid is H2SO4.