balancing chemical equations

Question 1

What coefficient should be used to make the following equation balanced?
N2+O2–> _NO?

Answer 1

2

Question 2

Balance this equation

_Al +_HCl –> _H2 +_AlCl3

Answer 2

2,6,3,2

Question 3

Balance the following equation:

___ H2+ ___ O2→___ H2O

Answer 3

2, 1, 2

Question 4

Balance the following equation:

___ Mg+ ___ O2→___ MgO

Answer 4

2, 1, 2

Question 5

Balance the following equation:

___ SeCl6+ ___ O2→___ SeO2+____Cl2

Answer 5

1, 1, 1, 3

Question 6

Balance this equation
_Zn+_HCl–>_ZnCl2 +_H2

Answer 6

1, 2, 1, 1

Question 7

Balance this equation
_N2 + _H2 –> _NH3

Answer 7

1, 3, 2

Question 8

A sealed test tube containing 8 grams of iron filings and 5 grams of sulfur is heated until the material in the test tube glows bright red. What is the mass of products?

Answer 8

Mass is equal to 13 grams