Counting Atoms

Front

What is the chemical formula for glucose?

Back

C6H12O6

Front

How many different elements are present in the compound C6H12O6?

Back

3 (Carbon, Hydrogen, Oxygen)

Front

What is the total number of atoms in the molecule H2SO4?

Back

7 (2 Hydrogen, 1 Sulfur, 4 Oxygen)

Front

What does a subscript in a chemical formula indicate?

Back

The number of atoms of the element in the molecule.

Front

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

Back

6 Sodium atoms

Front

How many Hydrogen atoms are in the compound 4H2O?

Back

8 Hydrogen atoms (4 x 2 = 8)

Front

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

Back

Coefficients indicate the number of molecules or moles of a compound.

Front

In the formula H2O, what do the numbers represent?

Back

The subscript '2' indicates there are 2 Hydrogen atoms and no subscript for Oxygen means there is 1 Oxygen atom.

Front

What is the total number of atoms in the compound C2H5OH?

Back

9 (2 Carbon, 6 Hydrogen, 1 Oxygen)

Front

How do you determine the number of atoms in a compound with parentheses?

Back

Multiply the subscript outside the parentheses by the subscripts of each element inside.