Open Stax Chemistry Balancing Reactions

How many atoms of carbon (C) are in C₆H₁₂O₆?

• 3
• 6
• 12
• 24

Tags

NGSS.MS-PS1-1

How many Sodium (Na) are in 6NaCl?

• 1
• 12
• 6

Tags

NGSS.HS-PS1-7

How many Aluminum are in Al₂O₃?

• 3
• 2
• 5

Tags

NGSS.MS-PS1-1

How many Hydrogen are in 4H₂O?

• 6
• 8
• 2
• 4

Tags

NGSS.MS-PS1-1

Balance this equation: _CO + _O₂ -> _CO₂

• 2CO + O₂ -> 2CO₂

• 2CO + O₂ -> CO₂

• CO + 2O₂ -> CO₂

Tags

NGSS.MS-PS1-5

Balance this equation: _P₄ + _O₂ --> _P₂O₃

• it is already balanced

• 2, 1, 3

• 1, 2, 3

• 1, 3, 2

Tags

NGSS.MS-PS1-5

Balance this equation: _Mg + _Cl₂ -> _MgCl₂

• 1, 2,1

• already balanced

• 2,1,1

• 1,1,2

Tags

NGSS.MS-PS1-5

When the equation H₂O₂ --> H₂O + O₂ is completely balanced, the coefficient for water is 

• 5
• 8
• 3
• 4

Tags

NGSS.MS-PS1-5

When the equation NH₃ + O₂ --> HNO₃ + H₂O is completely balanced using smallest whole numbers, the coefficient of O₂ would be

• 1
• 2
• 3
• 4

Tags

NGSS.MS-PS1-5

What does the Law of Conservation of Mass state?

• Matter cannot be gained or lost in a chemical reaction.
• Matter can only be lost in a chemical reaction.
• Matter can only be gained in a chemical reaction.
• Matter can be gained and lost in a chemical reaction. 

Tags

NGSS.MS-PS1-5