Counting Atoms Practice Quiz

Counting Atoms in Chemical Formulas

1. Calculation of Atoms in ( H2(SO4)_3 )

• Hydrogen (H): 2

• Sulfur (S): 3

• Oxygen (O): 12

2. Calculation of Atoms in ( 4NH_4OH )

• Nitrogen (N): 4

• Hydrogen (H): 16

• Oxygen (O): 4

3. Calculation of Atoms in ( Pb(NO3)2 )

• Lead (Pb): 1

• Nitrogen (N): 2

• Oxygen (O): 6

4. Calculation of Atoms in ( 3LiH2(PO4)_2 )

• Lithium (Li): 3

• Hydrogen (H): 12

• Phosphorus (P): 6

• Oxygen (O): 24

5. Calculation of Atoms in ( Cr(MnO4)6 )

• Chromium (Cr): 1

• Manganese (Mn): 6

• Oxygen (O): 24

6. Calculation of Atoms in ( 2H2SO4 )

• Hydrogen (H): 4

• Sulfur (S): 2

• Oxygen (O): 8

7. Calculation of Atoms in ( 12NH_4OH )

• Nitrogen (N): 12

• Hydrogen (H): 48

• Oxygen (O): 12

8. Calculation of Atoms in ( 4Pb(NO3)2 )

• Lead (Pb): 4

• Nitrogen (N): 8

• Oxygen (O): 24

9. Calculation of Atoms in ( LiH2PO4 )

• Lithium (Li): 1

• Hydrogen (H): 2

• Phosphorus (P): 1

• Oxygen (O): 4

10. Calculation of Atoms in ( 3Cr(MnO4)6 )

• Chromium (Cr): 3

• Manganese (Mn): 18

• Oxygen (O): 72

Summary of Counting Atoms in Groups

• Each entry involves identifying the subscripts in the chemical formula and calculating the total number of each type of atom based on the multiplication by any coefficients present.

• This method is essential in the study of chemistry for accurately describing the composition of chemical compounds and reactions.