Counting Atoms & Balancing Equations

Front

What are the numbers found on the lower right-hand side of an element symbol called?

Back

Subscript

Front

In the compound 4CF2Cl2, how many atoms of Carbon (C) are there?

Back

4

Front

In the compound H2SO4, how many atoms of Sulfur (S) are there?

Back

1

Front

How many different elements are present in the molecule 3NH4C2H3O2?

Back

4

Front

What is the product of the reaction 2H2 + O2?

Back

2H2O

Front

What is a coefficient in a chemical equation?

Back

A coefficient is a number placed in front of a chemical formula to indicate how many molecules or atoms are involved in the reaction.

Front

What does the term 'balancing equations' mean in chemistry?

Back

Balancing equations means making sure that the number of atoms for each element is the same on both sides of the equation.

Front

What is the purpose of subscripts in a chemical formula?

Back

Subscripts indicate the number of atoms of each element in a molecule.

Front

In the formula C6H12O6, how many hydrogen (H) atoms are there?

Back

12

Front

What is the significance of the law of conservation of mass in balancing chemical equations?

Back

The law of conservation of mass states that mass is neither created nor destroyed in a chemical reaction, so the total mass of reactants must equal the total mass of products.