Balanced or Not

In this image, what are the information in red is called the_______.

• Product
• Reactant
• Chemical Subscript
• Coefficient

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

• Product
• Reactant
• Chemical Subscript

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.HS-PS1-7

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

• Yes!
• NO!

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.HS-PS1-7

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.HS-PS1-7

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

• 2
• 6
• 1
• 4

Tags

NGSS.HS-PS1-7

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

• 2
• 6
• 1
• 4

Tags

NGSS.HS-PS1-7

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

• balanced
• unbalanced

Tags

NGSS.HS-PS1-7

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

• 1
• 2
• 3
• 4

Tags

NGSS.HS-PS1-7