SPS3 Review

Front

What is the law of conservation of mass?

Back

The law of conservation of mass states that in a closed system, the total mass of reactants is equal to the total mass of products in a chemical reaction.

Front

How many atoms of aluminum are in the compound 4Al₂O₃?

Back

There are 8 aluminum atoms in the compound 4Al₂O₃.

Front

What does it mean for a chemical equation to be balanced?

Back

A balanced chemical equation has the same number of each type of atom on both sides of the equation, indicating that mass is conserved.

Front

If 10g of reactants produce 13g of products, what can be concluded?

Back

7g of gas was produced, indicating that mass was lost in the form of gas.

Front

What is the balanced equation for the reaction of NO and O₂ to form NO₂?

Back

2NO + O₂ → 2NO₂ is the correctly balanced equation.

Front

What happens to the mass of reactants during a chemical reaction?

Back

The mass of the reactants remains the same as the mass of the products, according to the law of conservation of mass.

Front

What is a reactant in a chemical reaction?

Back

A reactant is a substance that undergoes change during a chemical reaction.

Front

What is a product in a chemical reaction?

Back

A product is a substance that is formed as a result of a chemical reaction.

Front

What is the significance of balancing chemical equations?

Back

Balancing chemical equations ensures that the same number of atoms of each element is present on both sides, reflecting the conservation of mass.

Front

What is the difference between an unbalanced and a balanced chemical equation?

Back

An unbalanced equation does not have equal numbers of each type of atom on both sides, while a balanced equation does.