Counting Atoms Review

Front

What is the formula for water?

Back

H₂O

Front

How many atoms are in one molecule of H₂O?

Back

3 (2 Hydrogen and 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 Chlorine (Cl) atoms are in 7 Cl₂?

Back

14

Front

How many Magnesium (Mg) atoms are in 10 MgCl₂?

Back

10

Front

How many Hydrogen (H) atoms are in 4 H₂O?

Back

8

Front

How many Oxygen (O) atoms are in 5 O₂?

Back

10

Front

What is the significance of coefficients in a chemical formula?

Back

They indicate the number of molecules or moles of a substance.

Front

What is the chemical formula for two hydrogen atoms and one oxygen atom?

Back

H₂O

Front

If a compound has the formula C₃H₈, how many hydrogen atoms does it contain?

Back

8