Front

What is a coefficient in a chemical equation?

Back

A coefficient is a number placed in front of a chemical formula in an equation to indicate how many molecules or moles of that substance are involved in the reaction.

Front

How do you balance a chemical equation?

Back

To balance a chemical equation, adjust the coefficients of the reactants and products to ensure that the number of atoms of each element is the same on both sides of the equation.

Front

What is the formula for dinitrogen monoxide?

Back

N₂O

Front

What is the correct name for (NH₄)₂SO₄?

Back

Ammonium sulfate

Front

What type of reaction is C₂H₂ + O₂ → CO₂ + H₂O?

Back

Combustion

Front

What is the difference between a synthesis reaction and a decomposition reaction?

Back

A synthesis reaction combines two or more substances to form a new compound, while a decomposition reaction breaks down a compound into simpler substances.

Front

What is the significance of the law of conservation of mass in chemical reactions?

Back

The law of conservation of mass states that mass is neither created nor destroyed in a chemical reaction; the total mass of reactants equals the total mass of products.

Front

What is the general formula for a combustion reaction?

Back

The general formula for a combustion reaction is: Hydrocarbon + O₂ → CO₂ + H₂O.

Front

What is the formula for ammonium sulfate?

Back

(NH₄)₂SO₄

Front

What does it mean to say a chemical equation is balanced?

Back

A balanced chemical equation has equal numbers of each type of atom on both sides of the equation, reflecting the conservation of mass.