Chemical Equations

Identify the number in blue.

• Product

• Reactant

• Coefficient

• Subscript

Tags

NGSS.MS-PS1-1

In what state is this substance?

• solid precipitate

• dissolved in water

• released as a gas

• liquid

Tags

NGSS.MS-PS1-4

How many atoms of nitrogen are in the compound shown above?

• 1

• 2

• 3

• 4

Tags

NGSS.MS-PS1-1

What are the blue numbers called?

• oxidation numbers

• subscripts

• group numbers

• product numbers

Tags

NGSS.MS-PS1-1

What does the symbol inside the circle mean?

• "yields, or produces"

• "dissolved in water"

• "forms a precipitate"

• "released as a gas"

Tags

NGSS.MS-PS1-5

Is the compound in the pink box a Reactant or a Product?

• Reactant

• Product

Tags

NGSS.MS-PS1-5

NGSS.MS-PS1-2

How many molecules of KNO₃ are shown?

• 1

• 2

• 3

• 4

Which of the following shows the correct way to balance the chemical equation?
Fe + O₂ -> Fe₂O₃

• 4Fe + 3O₂ -> 2Fe₂O₃
• 2 Fe + 3O₂ -> Fe₂O₆
• 4 Fe + O₆ -> 2Fe₂O₃
• None of the options are correctly balanced.

Tags

NGSS.MS-PS1-5

Which of the following reactions is balanced?

• 2CH₄ + O₂ -> CO₂ + H₂O
• CH₄ + 2O₂ -> CO₂ + H₂O
• CH₄ + 2O₂ -> CO₂ + 2H₂O
• None of the chemical equations are balanced.

Tags

NGSS.MS-PS1-5

How many HCl molecules do you need to balance this equation? 
Mg +  __HCl --->  MgCl₂ + H₂

• 1
• 2
• 3
• 4

Tags

NGSS.MS-PS1-5