HC Final Exam F24

Front

What is the law of conservation of mass?

Back

The law of conservation of mass states that matter cannot be created or destroyed in a chemical reaction; it can only be transformed or changed from one form to another.

Front

What does a line in a Lewis structure represent?

Back

Each line in a Lewis structure indicates that 2 electrons are shared between atoms.

Front

What are reactants in a chemical reaction?

Back

Reactants are the starting substances in a chemical reaction that undergo change to form products.

Front

What happens to atoms during a chemical reaction?

Back

In a chemical reaction, the ways in which atoms are joined together change, but no new atoms are formed.

Front

What is an acid?

Back

An acid is a substance that donates protons (H⁺ ions) in a chemical reaction and typically has a sour taste.

Front

What is the correct formula and name for phosphoric acid?

Back

The correct formula for phosphoric acid is H₃PO₄.

Front

What is the significance of balancing chemical equations?

Back

Balancing chemical equations is necessary to satisfy the law of conservation of mass, ensuring that the number of atoms of each element is the same on both sides of the equation.

Front

What is the law of definite proportions?

Back

The law of definite proportions states that a chemical compound always contains its component elements in fixed ratio by mass.

Front

What is the difference between a reactant and a product?

Back

A reactant is a substance that undergoes change in a chemical reaction, while a product is a substance that is formed as a result of the reaction.

Front

What is a chemical equation?

Back

A chemical equation is a symbolic representation of a chemical reaction, showing the reactants and products along with their quantities.