Chemical formula

Front

What is a chemical formula?

Back

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.

Front

How do you determine the number of atoms in a compound?

Back

To determine the number of atoms in a compound, add the subscripts in the chemical formula. For example, in MgCO3, there are 1 Mg, 1 C, and 3 O, totaling 5 atoms.

Front

What is the chemical formula for Magnesium chloride?

Back

The chemical formula for Magnesium chloride is MgCl2.

Front

What taste is commonly associated with alkaline substances?

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Alkaline substances are commonly associated with a bitter taste.

Front

What is the pH range of acids?

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The pH range of acids is less than 7.

Front

Which of the following is a property of acids?

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Acids have a sour taste, can conduct electricity, and turn blue litmus paper red.

Front

What is the chemical formula for hydrochloric acid?

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The chemical formula for hydrochloric acid is HCl.

Front

Which compound is not an acid: HCl, H2SO4, HNO3, or CH4?

Back

CH4 (methane) is not an acid.

Front

What does a subscript in a chemical formula indicate?

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A subscript in a chemical formula indicates the number of atoms of the element in the compound.

Front

What is the chemical formula for sulfuric acid?

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The chemical formula for sulfuric acid is H2SO4.