Balancing Equations

Fill in the blanks with coefficient:

PCl₅+ _ H₂O → _ HCl + H₃PO₄

• 4, 5

• 1, 6

• 3, 8

• 2,2

Balance this equation

_Zn + _HCl → _ZnCl₂ + _H₂

• 1,1,2,1

• 1,1,1,2

• 1,2,1,1

• 2,1,1,1

Balance this equation

_N₂ + _H₂ → _NH₃

• 1,2,3

• 1,3,2

• 1,1,2

• 2,1,1

How many atoms of aluminum are on each side of the following equation:

4Al + 3O₂ --> 2Al₂ O₃

• 2

• 6

• 1

• 4

At the end of chemical reactions, what is the total mass of the reactants compared to the total mass of the products?

• the product is doubled
• the product is half the mass of the reactants
• the mass is the same
• the mass changes depending on the reaction

Tags

NGSS.MS-PS1-5

N₂ + H₂ = NH₄

• Balanced
• Unbalanced

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-PS1-2

NGSS.MS-PS1-5

Name the part in red:

H₂ + O₂ -> H₂O

• Coefficient
• Product
• Yield
• Subscript

Tags

NGSS.HS-PS1-7

Name the part in red:

_2_H₂ + _1_O₂ -> _2_H₂O

• Coefficient
• Product
• Yield
• Subscript

Tags

NGSS.HS-PS1-7

Name the part in red:

H₂ + O₂ -> H₂O

• Coefficient
• Product
• Reactant
• Subscript

Tags

NGSS.MS-PS1-1