Writing and Balancing Chemical Equations

The large number before a molecule is called a _______________.

• Subscript

• Capital Number

• Coefficient

Tags

7.6B

According to the law of conservation of mass, the total mass of the reacting substances is

• always more than the total mass of the products

• always less than the total mass of the products

• sometimes more and sometimes less than the total mass of the products

• always equal to the total mass of the products

Tags

NGSS.MS-PS1-5

What is the left part of a chemical equation called?
H_{2 +} O → H₂O

• Reactants
• Products 
• Yields 
• Chemical Equation 

Tags

NGSS.MS-PS1-5

Balance the following equation:

___ SeCl₆+ ___ O₂→___ SeO_{2+____}Cl₂

• 1, 1, 1, 3

• 2, 1, 2, 1

• 1, 2, 1, 2

• 2, 2, 2, 4

Tags

NGSS.MS-PS1-5

When metals bond with non-metals they form what type of bonds

• covalent
• ionic
• cooperative
• lewis

• _______ change the subscript to balance!

• • NEVER

• ALWAYS

Tags

NGSS.MS-PS1-5

Is this balanced?
Al + O₂ → 2Al₂O₃

• Yes
• No

Tags

NGSS.MS-PS1-5

Which number should go in the blank?
Al(NO₃)₃ + _  NaOH -> Al(OH)₃ + 3 NaNO₃

• 1
• 2
• 3
• 0

Tags

NGSS.MS-PS1-5

NGSS.MS-PS1-2

___ Al + ___ Br₂ -----> ____ AlBr₃

• 3, 2, 2

• 2, 3, 2

• 3, 2, 2

• 1, 2, 3

Tags

NGSS.MS-PS1-5

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

• Coefficient 
• Subscript
• Atom
• Equation