Writing and Balancing Chemical Reactions

What is the left part of a chemical equation called?

2H₂ + O₂ ---> 2H₂O

• Reactants

• Products

• Yields

• Chemical equation

What is the right part of a chemical equation called?

2H₂ + O₂ ---> 2H₂O

• Reactants

• Products

• Yields

• Chemical Equation

What is the total number of atoms present in 5Na₃PO₄?

• 5

• 40

• 55

• 8

Tags

NGSS.MS-PS1-1

How many Mn atoms are found in the following compound?

2MnO₄

• 1

• 4

• 2

• 8

Tags

NGSS.MS-PS1-1

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 is the number before a chemical formula called?

Example: 2H₂ + O₂ ---> 2H₂O

• Coefficient

• Subscript

• Atom

• Equation

How many elements are in C₆H₁₂O₆?

• 1

• 3

• 2

• 4

Tags

NGSS.MS-PS1-1

 

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 this equation:

H₂ + Cl₂ ---> HCl

• It is balanced.

• 3H₂ + Cl₂ ---> 6HCl

• H₂ + Cl₂ ---> 2HCl

• H₂ + 3Cl₂ ---> 6HCl

Tags

NGSS.HS-PS1-7