PhET - Build a Molecule

Front

What is hydrochloric acid?

Back

Hydrochloric acid (HCl) is a strong acid formed by the combination of hydrogen and chlorine. It is commonly used in laboratories and industry.

Front

What does the coefficient in a chemical formula represent?

Back

The coefficient indicates the number of molecules or moles of a substance in a chemical reaction.

Front

What is the molecular formula for ammonia?

Back

The molecular formula for ammonia is NH₃.

Front

What is the molecular formula for methane?

Back

The molecular formula for methane is CH₄.

Front

What is butyric acid?

Back

Butyric acid is a carboxylic acid with the chemical formula C₄H₈O₂, commonly found in butter and other fats.

Front

What does the subscript in a chemical formula indicate?

Back

The subscript indicates the number of atoms of an element in a molecule.

Front

What is the difference between a molecule and a compound?

Back

A molecule is a group of atoms bonded together, while a compound is a type of molecule that contains at least two different elements.

Front

What is the significance of the chemical formula CO₂?

Back

CO₂ represents carbon dioxide, a molecule consisting of one carbon atom and two oxygen atoms.

Front

What is the role of coefficients in balancing chemical equations?

Back

Coefficients are used to balance the number of atoms of each element on both sides of a chemical equation.

Front

What is a chemical reaction?

Back

A chemical reaction is a process that leads to the transformation of one set of chemical substances to another.