Balancing Equations Basic

What is the little number after an element in a chemical equation called.
Example: H₂

• Coefficient 

• Subscript

• Atom

• Equation

Is the following equation balanced?...
Al + O₂ --> 2Al₂O₃

• Yes!

• No!

Tags

NGSS.MS-PS1-5

What are the larger numbers that you CAN CHANGE in a chemical equation? 

• Coefficient 

• Products

• Reactants

• Subscripts

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

• 1

• 2

• 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

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

• 1

• 2

• 3

• 4

Tags

NGSS.MS-PS1-5

​​ (a)   S_{8 +} ​ ​ (b)   O₄ → ​ ​ ​ (c)   SO₂

• 1

• 4

• 8

Tags

NGSS.MS-PS1-5

​​ ​ ​ (a)   KClO₃ ​→ ​ 2KCl ​ ​+ ​ ​ (b)   O₂

• 3

• 6

• 4

• 2

Tags

NGSS.MS-PS1-5

​ (a)   H₂ + ​ (b)   O₂ → 2H₂O

• 2

• 1

• 3

• 4

Tags

NGSS.MS-PS1-5

​ (a)   Al₂O₃ → (b)   Al + ​ ​ (c)   O₂

• 4

• 3

• 2

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5