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 equation is balanced?

PbO₂ + 2H₂

,

SO₂ + H₂0 --> 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

What law governs the balancing of chemical equations?

Back

Law of Conservation of Matter/Mass

Front

Total number of atoms in 5Na₃PO₄

Back

40

Front

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

Back

2,6,3,2

Front

Coefficients to balance: __Ca + __H₂O --> __Ca(OH)₂ + __H₂

Back

1,2 --> 1,1

Front

What is the right ratio of chemicals for the BCE (Balanced Chemical Equation)?__CO + __Fe₂O₃--> __Fe + __CO₂

Back

3,1 --> 2,3

Front

Coefficients to balance: AgNO₃ + H₂S --> Ag₂S + HNO₃

Back

2,1 --> 1,2

Front

Coefficients to balance: __H₂ + __S --> __H₂S

Back

1,1 --> 1