Counting Atoms

Front

What is the chemical formula for sodium chloride?

Back

NaCl

Front

How many atoms are in one molecule of water (H2O)?

Back

3 (2 hydrogen atoms and 1 oxygen atom)

Front

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

Back

24 (6 carbon, 12 hydrogen, and 6 oxygen atoms)

Front

How do you determine the number of elements in a chemical formula?

Back

Count the different chemical symbols present in the formula.

Front

What is the significance of subscripts in a chemical formula?

Back

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

Front

In the reaction 2H2 + O2 -> 2H2O, what are the products?

Back

2H2O (water)

Front

How many sodium atoms are present in the formula 6NaCl?

Back

6 sodium atoms.

Front

What is the total number of elements in the formula NaHCO3?

Back

4 (sodium, hydrogen, carbon, and oxygen)

Front

What does the term 'reactants' refer to in a chemical equation?

Back

Reactants are the starting substances that undergo a chemical change.

Front

How many different elements are present in the formula H2COCH2?

Back

3 (hydrogen, carbon, and oxygen)