Counting Atoms

Front

What is the chemical formula for water?

Back

H₂O

Front

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

Back

3 (2 Hydrogen + 1 Oxygen)

Front

What does the subscript in a chemical formula indicate?

Back

The number of atoms of the element in the molecule.

Front

How many Oxygen atoms are in H₂O?

Back

1

Front

How many Hydrogen atoms are in H₂O?

Back

2

Front

What is the total number of atoms in 4H₂O?

Back

12 (8 Hydrogen + 4 Oxygen)

Front

How many Magnesium atoms are in 10MgCl₂?

Back

10

Front

What is the total number of atoms in C₆H₁₂O₆?

Back

24 (6 Carbon + 12 Hydrogen + 6 Oxygen)

Front

How many different elements are in C₆H₁₂O₆?

Back

3 (Carbon, Hydrogen, Oxygen)

Front

What is the significance of the coefficients in a chemical formula?

Back

They indicate the number of molecules or moles of the compound.