Chemical Formulas and Equations REVIEW

Front

What elements are present in potassium carbonate (K₂CO₃)?

Back

Potassium, Carbon, and Oxygen.

Front

How many atoms are in one molecule of serotonin (C₁₀H₁₂N₂O)?

Back

25 atoms.

Front

How many sulfur atoms are in sodium sulfate (Na₂SO₄)?

Back

1 sulfur atom.

Front

How many atoms are in one molecule of baking soda (NaHCO₃)?

Back

6 atoms.

Front

What is the best evidence of a chemical reaction producing carbon dioxide?

Back

Formation of bubbles.

Front

What is a chemical formula?

Back

A representation of a substance using symbols for its constituent elements.

Front

What does the subscript in a chemical formula indicate?

Back

The number of atoms of the element in the molecule.

Front

What is the difference between a chemical formula and a chemical equation?

Back

A chemical formula shows the elements and their ratios in a compound, while a chemical equation shows the reactants and products of a chemical reaction.

Front

What is the law of conservation of mass?

Back

In a chemical reaction, mass is neither created nor destroyed.

Front

What is a reactant in a chemical reaction?

Back

A substance that undergoes change during a chemical reaction.