Chem and Physical Science Final Review

Front

What type of reaction is represented by the equation P₄ + 3O₂ → 2P₂O₃?

Back

Synthesis reaction: A type of chemical reaction where two or more reactants combine to form a single product.

Front

When balancing chemical equations, what can you only add, change, or remove?

Back

Coefficients: Numbers placed in front of compounds to balance the number of atoms of each element.

Front

What does MgCl₂ represent in chemistry?

Back

Chemical Formula: A representation of a chemical compound using symbols for its constituent elements.

Front

How many different elements are present in the chemical formula C₆H₁₂O₆?

Back

3: The elements are Carbon (C), Hydrogen (H), and Oxygen (O).

Front

What type of chemical reaction occurs when two substances react to form a single product?

Back

Synthesis reaction: A reaction where two or more reactants combine to form one product.

Front

What is the definition of a chemical equation?

Back

A symbolic representation of a chemical reaction, showing the reactants and products.

Front

What is the purpose of balancing a chemical equation?

Back

To ensure that the number of atoms for each element is the same on both sides of the equation, in accordance with the law of conservation of mass.

Front

What is a subscript in a chemical formula?

Back

A number written below and to the right of a chemical symbol indicating the number of atoms of that element in the molecule.

Front

What is a coefficient in a chemical equation?

Back

A number placed in front of a compound in a chemical equation to indicate how many molecules or moles of that compound are involved.

Front

What is the difference between an element and a compound?

Back

An element is a pure substance made of only one type of atom, while a compound is made of two or more different types of atoms chemically bonded together.