Balancing Chemical Equations Labaids

Which of the following is the correct balanced equation for the reaction of hydrogen and oxygen to form water?

• H2 + O2 → H2O

• 2H2 + O2 → 2H2O

• H2 + 2O2 → H2O

• 2H2 + 2O2 → 2H2O

Fill in the blank: In the chemical equation for the electrolysis of water, the reactants are H2O and the products are ______.

• H2 and O2

• H2O2 and O2

• H2 and O3

• H2O and O2

What is the term for the number in front of a chemical formula in an equation?

• Subscript

• Coefficient

• Product

• Reactant

Fill in the blank: The balanced equation for the electrolysis of water is 2H2O → 2H2 + ______.

• O2

• O3

• H2O2

• H2O

In the context of chemical equations, what does the term 'reactants' refer to?

• The compounds you end with

• The compounds you start with

• The balance of the equation

• The direction of the reaction.

What is the main difference between the equations in Figure 4.26 and Figure 4.27?

• A) One is balanced, the other is not

• B) One has more reactants

• C) One has more products

• D) One is a different reaction.

Fill in the blank: The coefficient in a chemical equation indicates how many ______ participate in the reaction.

• Atoms

• Molecules

• Products

• Reactants

In the electrolysis of water, what are the products formed?

• H2 and O2

• H2O and O2

• H2 and O3

• H2O2 and O2

Fill in the blank: A product is a substance that is _______ in a chemical reaction.

• used

• created

• rearranged

• balanced

What does a chemical equation represent?

• The number of molecules in a reaction

• A representation of a chemical reaction showing reactants and products

• The total number of atoms in a balanced equation

• A process that rearranges atoms.