What does a subscript describe in a molecular formula?

All compounds are molecules, but not all molecules are compounds. This statement is...

Which term refers to the molecules that are present before a chemical reaction occurs?

Which of the following pairs is most likely to form an ionic bond?

Which of the following pairs will create the strongest atomic bond?

How many valence electrons are there on an Oxygen atom?

A chemical reaction starts with 2 H2 and O2. According to the Law of Conservation of Mass, how many hydrogen and oxygen should be in the product?

What coefficients would balance this equation? ___ C + ___ O2 --> ___ CO

What coefficients would balance this equation? ___Fe + ___ H2O --> ___ H2 + ___ Fe3O4

What coefficients would balance this equation? ___ C12H26 + ___ O2 --> ___ CO2 + ___ H2O

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