Law of Conservation of Mass

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Presentation transcript:

Law of Conservation of Mass

Counting Atoms Count the number of atoms in the following chemical formula: 6H2O

Counting Atoms Count the number of atoms in the following chemical formula: 7MnO4

Counting Atoms Count the number of atoms in the following chemical formula: 4HNO3

Counting Atoms Count the number of atoms in the following chemical formula: Al2O3

Counting Atoms Count the number of atoms in the following chemical formula: 5Al2O3

Counting Atoms Count the number of atoms in the following chemical formula: H2O + H2O

Counting Atoms Count the number of atoms in the following chemical formula: 4H2O + 3H2O

Counting Atoms Count the number of atoms in the following chemical formula: 4H2O + H2O

Counting Atoms Count the number of atoms in the following chemical formula: H2O + MnO4

Counting Atoms Count the number of atoms in the following chemical formula: 3H2O + 2MnO4

Counting Atoms Count the number of atoms in the following chemical formula: 4H2O + 3MnO4

Is it balanced? Prove it! NaCl  Na + Cl2

Is it balanced? Prove it! H2 + O2  2H2O

Is it balanced? Prove it! 2Fe + MnO4  2FeO2 + Mn

Is it balanced? Prove it! N2O5 + H2O  2HNO3

Is it balanced? Prove it! 2H2O2  2H2O + O2

Subscript vs. Coefficient N2O5 + H2O  2HNO3 ? ?

Which of the following rules do we use when balancing chemical equations? A. Law of Conservation of Atoms B. Law of Conservation of Mass C. Law of Conservation of Products D. Law of Conservation of Reactants.

Which of the following do you change to balance an equation? Subscript Elements Compounds Coefficients

Which coefficient would I add to balance the chemical equation? 6AlBr3 + 3N2  2Al3N3+ ?Br2 3 6 7 9

Which coefficient would I add to balance the chemical equation? 2C2H6 + 7O2  4CO2 + ?H2O 5 6 7 14

A chemical equation is shown below: 2Zn + 2HCl  2ZnCl + H2 + heat A chemical equation is shown below: 2Zn + 2HCl  2ZnCl + H2 + heat. The element zinc (Zn) can best be described as: A. compound B. mixture C. gas D. reactant

A chemical equation is shown below A chemical equation is shown below. C6H12O6 + 6O2  6CO2 + 6H2O What are the products of the reaction? A. H2O and O2 B. C6H12O6 and CO2 C. CO2 + H2O D. C6H12O6 + O2

Balance the following equation: __PbO + __C  __Pb + __CO2

Balance the following equation: __Na3N  __Na + __N2

Balance the following equation: __P4 + __O2  __P2O5

Balance the following equation: __Al2O3  __Al + __O2

Balance the following equation: __Fe + __H2O  __Fe3O4 + __H2

Balance the following equation: __H2O2  __H2O + __O2