Is it balanced?

The law of conservation of mass states that....

• Matter can be made
• Matter can be destroyed
• Matter can neither be made or destroyed
• Matter can evaporate

Tags

NGSS.MS-PS1-5

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

• Yes!
• NO!

Tags

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

Why is the following chemical equation not balanced?
H_{2 +} O₂ --> H₂O

• each side of the equation has a different number of oxygen atoms
• each side of the equation has a different number of hydrogen atoms
• each side has the same mass

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-PS1-5

NGSS.MS-PS1-2

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

• balanced
• unbalanced

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

The substances at the beginning of a chemical reaction are called the ____

• product
• yield
• chemical symbol
• reactants

Tags

NGSS.MS-PS1-1

What is the part of the chemical equation in green called? 
Fe + S --> FeS

• products
• reactants
• yield
• chemical formula

Chemical Reaction

• a substance formed as a result of a chemical reaction

• a change in matter that produces one or more new substances

• the process in which substances undergo chemical changes that result in the formation of new substances

• a substance that enters into a chemical reaction

Tags

NGSS.MS-PS1-5

NGSS.MS-PS1-2