Balancing Equations

How many Hydrogen are in 4H₂O?

• 6
• 8
• 2
• 4

Is the following equation balanced?...
Al + O₂ --> 2Al₂O₃

• Yes!
• No!

Tags

NGSS.HS-PS1-7

Balance this equation.
_CH₄ + _O₂ --> _CO₂ + _H₂O

• 1,2,1,1
• 2,1,2,1
• 1,2,1,2
• 0,2,0,2

Balance this equation, CaCO₃(s) → CaO(s) + CO₂(g)?

• 3,1,2

• 1,1,1

• 1,3,1

• 2,6,3

What is the left part of a chemical equation called?
2H_{2 +} O₂ --> 2H₂O

• Reactants
• Products 
• Yields 
• Chemical Equation 

What is the right part of a chemical equation called...
2H_{2 +} O₂ --> 2H₂O

• Reactants
• Products 
• Yields 
• Chemical Equation 

Balance this equation.
_Mg + _Cl₂ --> _MgCl₂

• 1, 2,1
• already balanced
• 2,1,1
• 1,1,2

According to the Law of Conservation of mass the mass of the _________ must equal the mass of the _________.

• compounds, mixtures

• reactants, products

• elements, chemicals

• substances, destroyed

Tags

NGSS.HS-PS1-7

Which picture represents a compound?

• A

• B

• C

• D

Tags

NGSS.MS-PS1-1

In the reaction above, what are the reactants?

• glucose and oxygen

• water

• water and carbon dioxide

• carbon, oxygen, and hydrogen

Tags

NGSS.HS-LS1-5

NGSS.HS-LS2-5