Writing and Balancing Chemical Equations

Is the following equation balanced?
2C₂H₂ + 5O₂ --> 4CO₂ + 2H₂O

• yes

• no

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which of the following equations are correctly balanced?

• 12CO₂ +H₂O --> C₆H₁₂O₆ + O₂

• CO₂ + 9H₂O --> C₆H₁₂O₆ + O₂

• CO₂ + H₂O --> 3C₆H₁₂O₆ + O₂

• 6CO₂ + 6H₂O --> C₆H₁₂O₆ + 6O₂

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Balance the following equation:

___ H₂+ ___ O₂→___ H₂O

• 1, 1, 3

• 2, 2, 2

• 1, 2, 1

• 2,1, 2

Tags

NGSS.MS-PS1-5

Balance the following equation:

___ Mg+ ___ O₂→___ MgO

• 1, 1, 3

• 2, 1, 2

• 1, 2, 1

• 2, 2, 2

Tags

NGSS.MS-PS1-5

• 3

• 2

Tags

NGSS.MS-PS1-5

​ (a)   Fe₂O₃ + ​ ​ (b)   H₂ --> ​ ​ (c)   Fe + ​ (d)   H₂O

• 1

• 6

• 4

• 5

• 7

• 8

• 9

• 2

• 3

Tags

NGSS.MS-PS1-5

Balance this equation:

​ (a)   FeCl₂ + ​ (b)   Cl₂ --> ​ (c)   FeCl₃

• 2

• 1

• 3

• 4

Tags

NGSS.MS-PS1-5

The numbers placed in ​ (a)   of formulas to balance equations are called ​ (b)   , and they multiply all the atoms in a ​ (c)   . Thus, the symbol “2NaHCO₃” indicates ​ (d)   units of sodium bicarbonate, which contain 2 Na atoms, 2 H atoms, 2 C atoms, and 6 O atoms

(2 X 3= 6, the coefficient times the subscript for O).

• front

• coefficients

• two

• formula

​ ​ Balance the equation. The options can be used more than once.

​ ​ (a)   K   + Cl₂       →     ​ ​ (b)   KCl

• 2

• 3

• 4

• 1

Tags

NGSS.MS-PS1-5

Balance the Equation.

​ (a)   P₄ + ​ (b)   O₂ --> ​ (c)   P₂O₃

• 1

• 3

• 2

• 4

Tags

NGSS.MS-PS1-5