Balancing Chemical Equations

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.

Front

How many atoms of carbon (C) are in C6H12O6?

Back

There are 6 atoms of carbon in C6H12O6.

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, meaning mass is conserved.

Front

Is the equation Al + O2 → 2Al2O3 balanced?

Back

No, it is not balanced.

Front

How many hydrogen atoms are in 4H2O?

Back

There are 8 hydrogen atoms in 4H2O.

Front

How many different elements are in C6H12O6?

Back

There are 3 different elements in C6H12O6: carbon (C), hydrogen (H), and oxygen (O).

Front

What is the purpose of balancing chemical equations?

Back

The purpose is to ensure that the same number of each type of atom is present on both sides of the equation, reflecting the conservation of mass.

Front

What is the total number of atoms in the molecule C6H12O6?

Back

There are 24 total atoms in C6H12O6 (6 C + 12 H + 6 O).

Front

What does the subscript in a chemical formula indicate?

Back

The subscript indicates the number of atoms of the element in one molecule of the compound.

Front

What is the balanced equation for the combustion of methane (CH4)?

Back

The balanced equation is CH4 + 2O2 → CO2 + 2H2O.