Balancing Chemical Equations Flashcard

Front

What is a balanced chemical equation?

Back

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

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

How do you balance a chemical equation?

Back

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

Front

What is the balanced equation for the combustion of methane?

Back

@@CH_4 + 2O_2 ightarrow CO_2 + 2H_2O@@.

Front

How many moles of oxygen are needed to completely react with 1 mole of methane?

Back

2 moles of oxygen are needed.

Front

What is the balanced equation for the formation of water from hydrogen and oxygen?

Back

@@2H_2 + O_2 ightarrow 2H_2O@@.

Front

How many moles of hydrogen are required to react with 10 moles of nitrogen to produce ammonia?

Back

30 moles of hydrogen are required.

Front

What is the balanced equation for the combustion of propane?

Back

@@C_3H_8 + 5O_2 ightarrow 3CO_2 + 4H_2O@@.

Front

How many moles of iron are needed to react with 3 moles of oxygen to form iron(III) oxide?

Back

6 moles of iron are needed.

Front

What is the balanced equation for the reaction of nitrogen and hydrogen to form ammonia?

Back

@@N_2 + 3H_2 ightarrow 2NH_3@@.