Counting Atoms Practice Quiz


Count the atoms in the following molecules.

1. H2SO4 - how many H? _____ how many S? _____ how many O? _____

2. NH4OH - how many N? _____ how many H? _____ how many O? _____

3. Pb(NO3)2 - how many Pb? _____ how many N? _____ how many O? _____

4. 3LiH2PO4 - how many Li? _____ how many H? _____ how many P? _____

                                                how many O? _____

5. Cr(MnO4)6 - how many Cr? _____ how many Mn? _____ how many O? _____

6. 2H2SO4 - how many H? _____ how many S? _____ how many O? _____

7. 12NH4OH - how many N? _____ how many H? _____ how many O? _____

8. 4Pb(NO3)2 - how many Pb? _____ how many N? _____ how many O? _____

9. LiH2PO4 - how many Li? _____ how many H? _____ how many P? _____

                            how many O? _____

10. 3Cr(MnO4)6 - how many Cr? _____ how many Mn? _____ how many O? _____
 
 
 



























































 
 Answers to Practice Quiz:
 
1. H2SO4 - how many H? __2___ how many S? __1___ how many O? __4___

2. NH4OH - how many N? __1___ how many H? _5____ how many O? __1___

3. Pb(NO3)2 - how many Pb? ___1__ how many N? __2___ how many O? __6___

4. 3LiH2PO4 - how many Li? __3___ how many H? __6___ how many P? ___3__

                                                how many O? __12___

5. Cr(MnO4)6 - how many Cr? ___1__ how many Mn? __6___ how many O? ___24__

6. 2H2SO4 - how many H? ___4__ how many S? ___2__ how many O? ___8__

7. 12NH4OH - how many N? __12___ how many H? __60___ how many O? _12____

8. 4Pb(NO3)2 - how many Pb? __4___ how many N? __8___ how many O? __24___

9. LiH2PO4 - how many Li? ___1__ how many H? ___2__ how many P? __1___

                            how many O? __4___

10. 3Cr(MnO4)6 - how many Cr? __3___ how many Mn? __18___ how many O? ___72__
 
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