Balanced and Unbalanced Chemical Equations

Which of the following equations is balanced?

• P₄ + 3O₂ ---> 2P₂O₃

• N₄ + 3F₂ ---> 2NF₃

• 2LiF + Br₂ ---> 2LiBr + F₄

Tags

NGSS.MS-PS1-5

How many atoms of aluminum are on each side of the following equation: 4Al + 3O₂ --> 2Al₂ O₃

• 2

• 6

• 1

• 4

Tags

NGSS.MS-PS1-1

Is the following equation balanced or unbalanced?
Fe + S --> FeS

• balanced

• unbalanced

Tags

NGSS.MS-PS1-5

Determine whether the following equation is balanced or unbalanced. 2Fe + 3Cl₂ ---> FeCl₃

• Balanced

• Unbalanced

Tags

NGSS.MS-PS1-5

In this image, what are the information to the right of the arrow (in black) is called the_______?

• Product

• Reactant

• Chemical Subscript

Tags

NGSS.MS-PS1-2

Is this balanced?...
Al + O₂ --> 2Al₂O₃

• Yes!

• NO!

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

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

What coefficient should be used to make the following equation balanced?
N₂+O₂--> _NO 

• 1

• 2

• 3

• 4

Tags

NGSS.MS-PS1-5

Which of the following chemical equations is balanced?

• @@ ext{C}_2 ext{H}_4 + 3 ext{O}_2 ightarrow 2 ext{CO}_2 + 2 ext{H}_2 ext{O}@@

• @@ ext{C}_3 ext{H}_8 + 5 ext{O}_2 ightarrow 3 ext{CO}_2 + 4 ext{H}_2 ext{O}@@

• @@ ext{C}_2 ext{H}_6 + 7 ext{O}_2 ightarrow 4 ext{CO}_2 + 6 ext{H}_2 ext{O}@@

• @@ ext{C}_4 ext{H}_{10} + 6.5 ext{O}_2 ightarrow 4 ext{CO}_2 + 5 ext{H}_2 ext{O}@@

Tags

NGSS.MS-PS1-5

In the equation @@ ext{2H}_2 + ext{O}_2 ightarrow ext{2H}_2 ext{O}@@, how many oxygen atoms are present on each side of the equation?

• 1

• 2

• 3

• 4

Tags

NGSS.MS-PS1-5