Balancing Chemical Equations

Front

Law of Conservation of Mass

Back

It states that matter cannot be created or destroyed.

Front

What coefficient should be used to make the equation N₂+O₂--> _NO balanced? Options: 1, 2, 3, 4

Back

2

Front

Which problem is balanced?
Options: PbO₂ + 2H₂, SO₂ + H₂0 --> H₂SO₄, 2Na + 2H₂O --> 2NaOH + H₂

Back

2Na + 2H₂O --> 2NaOH + H₂

Front

Identify the unbalanced equation: CaCO₃--> CaO + CO₂, PbO₂+ 2H₂-->2Pb + H₂O, 2Na+ 2H₂O-->2NaOH + H₂, CS₂+ 2O₂--> CO₂+ 2SO₂

Back

PbO₂+ 2H₂-->2Pb + H₂O

Front

Balance this equation: _Al +_HCl --> _H₂ +_AlCl₃

Back

2,6,3,2

Front

Is the following equation balanced?
4Fe + 3O₂ --> 2Fe₂O₃

Back

yes

Front

Balance this equation: H₂ + Cl₂ ---> HCl

Back

H₂ + Cl₂ ---> 2HCl

Front

Balance this equation: HgO ---> 2Hg + O₂

Back

2HgO ---> 2Hg + O₂

Front

Balance the equation: Sb₂S₃ + O₂ ---> Sb + SO₂

Back

Sb₂S₃ + 3O₂ ---> 2Sb + 3SO₂

Front

Determine the coefficients to balance the equation: __Al +__HCl --> __H₂ +__AlCl₃

Back

2,6,3,2