Chemical Reactions

Balance this equation: ___ Cl₂ + ___ KI → ___ KCl + ___ I₂

• ___ Cl₂ + ___ KI → ___ KCl + 2 I₂
• 2 Cl₂ + ___ KI → ___ KCl₂ + ___ I₂
• ___ Cl₂ + 2 KI → 2 KCl + ___ I₂

In a chemical reaction, bonds are broken and new bonds are formed that create new substances. The bonds that are broken are called what?

• Reactants
• Products
• Atoms
• Catalysts

Tags

NGSS.MS-PS1-2

Balance this equation:  H₂ + N₂ → NH₃

•  H₂ + 4N₂ → NH₃
•  H₂ + 3N₂ → 2NH₃
•  3H₂ + N₂ → 2NH₃
•  2H₂ + 2N₂ → 2NH₃

Tags

NGSS.HS-PS1-7

When a substance in a chemical equation is followed by (aq), it means that the substance is...

• a catalys
• dissolved in water
• a liquid
• a product

What is the arrow in a chemical equation...
H_{2 +} O --> H₂O

• Reactants
• Products 
• Yields 
• Chemical Equation 

Tags

NGSS.MS-PS1-5

Is this balanced?...
Fe + S --> FeS

• YES!
• NO!

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

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

• Yes!
• NO!

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

How many atoms of carbon (C) are in C₆H₁₂O₆?

• 3
• 6
• 12
• 24

Tags

NGSS.MS-PS1-1

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

• product
• yield
• chemical symbol
• reactants

Tags

NGSS.MS-PS1-5

How many O's are in Al₂(SO₄)₃

• 4
• 12
• 7
• 24

Tags

NGSS.MS-PS1-1