Balancing Chemical Equations

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 + H₂O --> H₂SO₄, 2Na + 2H₂O --> 2NaOH + H₂

Back

2Na + 2H₂O --> 2NaOH + H₂

Front

How many HCl molecules do you need to balance this equation? Mg + __HCl ---> MgCl₂ + H₂

Back

2

Front

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

Back

2,6,3,2

Front

Which of the following equations are correctly balanced? Options: 12CO₂ +H₂O --> C₆H₁₂O₆ + O₂, CO₂ + 9H₂O --> C₆H₁₂O₆ + O₂, CO₂ + H₂O --> 3C₆H₁₂O₆ + O₂, 6CO₂ + 6H₂O --> C₆H₁₂O₆ + 6O₂

Back

6CO₂ + 6H₂O --> C₆H₁₂O₆ + 6O₂

Front

Balance the following equation: ___ H₂+ ___ O₂→___ H₂O

Back

2, 1, 2

Front

Balance the following equation: ___ Mg+ ___ O₂→___ MgO

Back

2, 1, 2

Front

Balance the equation: ___ SeCl₆ + ___ O₂ → ___ SeO₂ + ___ Cl₂

Back

1, 1, 1, 3

Front

Balance this equation
_Zn+_HCl-->_ZnCl₂ +_H₂

Back

1,2,1,1

Front

Balance this equation
_N₂ + _H₂ --> _NH₃

Back

1,3,2