Chemical Equations Review

Balance this equation:
MgCl₂ --> Mg₄+ Cl₂

• It's already balanced.
• 4MgCl₂ --> Mg₄+ 4Cl₂
• 4MgCl₂ --> Mg₄+ 5Cl₂

Tags

NGSS.MS-PS1-5

Balance this equation:
 2Li + Cl₂ -> LiCl

• 2Li + Cl₂ -> 4LiCl2
• 2Li + Cl₂ -> LiCl₂
• 2Li + Cl₂ -> 2LiCl

Tags

NGSS.MS-PS1-5

The substances listed on the left side of a chemical equation are the

(extra credit)

• Products

• Coefficients

• Precipitates

• Reactants

In chemical reactions, what does the principle of conservation of mass mean?

(extra credit)

• Matter is not created or destroyed.

• The total mass of the reactants is greater than the total mass of the products.

• The total mass of the reactants is less than the total mass of the products.

• Matter is not changed.

Tags

NGSS.MS-PS1-5

How many Hydrogen (H) atoms are in NH₃O5

• 3
• 4
• 5
• 1

Tags

NGSS.MS-PS1-1

Name the part in red (extra credit):

H₂ + O₂ -> H₂O

• Coefficient

• Product

• Yield

• Subscript

Name the part in red (extra credit):

_2_H₂ + _1_O₂ -> _2_H₂O

• Coefficient

• Product

• Yield

• Subscript

Name the part in red (extra credit):

H₂ + O₂ -> H₂O

• Coefficient

• Product

• Reactant

• Subscript

Name the part in red (extra credit):

H₂ + O₂ -> H₂O

• Coefficient

• Product

• Reactant

• Subscript

Tags

NGSS.MS-PS1-5

How many phosphorus atoms are in PO₄?

• 1
• 2
• 3
• 4

Tags

NGSS.MS-PS1-1