Types of Chemical Reactions, Balancing and Molar Mass Test

Front

What does the Law of Conservation of Matter state?

Back

The total mass of the reactants in a chemical reaction is equal to the mass of the products.

Front

What are coefficients in a chemical equation?

Back

Coefficients are the numbers placed before compounds in a chemical equation to indicate the number of molecules involved in the reaction.

Front

Identify the type of reaction: 3 Pb + 2 H₃PO₄ → 3 H₂ + Pb₃(PO₄)₂.

Back

Single Displacement Reaction.

Front

How many oxygen atoms are in Al₂(SO₄)₃?

Back

There are 12 oxygen atoms.

Front

Which of the following equations is correctly balanced? 6CO₂ + 6H₂O → C₆H₁₂O₆ + 6O₂

Back

This equation is correctly balanced.

Front

What is a synthesis reaction?

Back

A synthesis reaction is a type of chemical reaction where two or more simple substances combine to form a more complex product.

Front

What is a decomposition reaction?

Back

A decomposition reaction is a type of chemical reaction where a single compound breaks down into two or more simpler products.

Front

Define a combustion reaction.

Back

A combustion reaction is a chemical reaction that occurs when a substance combines with oxygen, releasing energy in the form of light or heat.

Front

What is the purpose of balancing chemical equations?

Back

Balancing chemical equations ensures that the Law of Conservation of Matter is upheld, meaning the number of atoms for each element is the same on both sides of the equation.

Front

What are subscripts in a chemical formula?

Back

Subscripts are the small numbers written to the lower right of an element symbol in a chemical formula, indicating the number of atoms of that element in a molecule.