Types of chemical equations

Front

What is the general formula for a combustion reaction?

Back

C_xH_y + O_2 -> CO_2 + H_2O

Front

What is a compound? Provide an example.

Back

A compound is a substance formed when two or more elements are chemically bonded together. Example: sodium chloride (NaCl).

Front

How do you calculate the percent composition by mass of an element in a compound?

Back

Percent composition by mass = (mass of element in 1 mole of compound / molar mass of compound) x 100%.

Front

What does a balanced chemical equation represent?

Back

A balanced chemical equation represents the conservation of mass, meaning the number of atoms of each element is the same on both sides of the equation.

Front

What is the percent by mass of phosphorus in H3PO4?

Back

31.6%.

Front

What type of reaction is represented by the equation CH4 + 2O2 → CO2 + 2H2O?

Back

Combustion reaction.

Front

What is the difference between a reactant and a product in a chemical reaction?

Back

Reactants are substances that undergo a chemical change, while products are the substances formed as a result of the reaction.

Front

What is the law of conservation of mass?

Back

The law of conservation of mass states that mass is neither created nor destroyed in a chemical reaction.

Front

What are the four main types of chemical reactions?

Back

The four main types of chemical reactions are synthesis, decomposition, single replacement, and double replacement.

Front

What is a balanced equation and why is it important?

Back

A balanced equation has equal numbers of each type of atom on both sides, ensuring the law of conservation of mass is followed.