Counting Atoms

Front

What is the formula for calculating the total number of atoms in a compound?

Back

Add the subscripts of all elements in the chemical formula.

Front

How many atoms are in one molecule of H2SO4?

Back

7 atoms (2 Hydrogen, 1 Sulfur, 4 Oxygen).

Front

What does the subscript in a chemical formula represent?

Back

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

Front

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

Back

10 Magnesium atoms.

Front

How many Hydrogen atoms are in 4H2O?

Back

8 Hydrogen atoms.

Front

How many Oxygen atoms are in one molecule of H2O?

Back

1 Oxygen atom.

Front

What is the total number of atoms in 6NaCl?

Back

12 atoms (6 Sodium and 6 Chlorine).

Front

If a compound has the formula C6H12O6, how many total atoms are there?

Back

24 atoms (6 Carbon, 12 Hydrogen, 6 Oxygen).

Front

What is the significance of coefficients in a chemical formula?

Back

Coefficients indicate the number of molecules or formula units.

Front

How many Sodium (Na) atoms are in 6NaCl?

Back

6 Sodium atoms.