Chemical Reactions

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

• Reactants

• Products 

• Starters

• Chemical Equation 

Tags

NGSS.MS-PS1-5

What is the right part of a chemical equation called? 2 H_{2 +} O₂ → 2 H₂O

• Reactants

• Products 

• Yields 

• Chemical Equation 

What are the PRODUCTS of the chemical reaction pictured?

• CH₄ and CO₂
• CH₄ and O₂
• CO₂ and H₂O
• O₂ and H₂O

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

CH₄ + 2 O₂ → CO₂ + 2H₂O
 In this equation, CH₄ is a

• product

• reactant

• displacement

• solute

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

True or False
In a chemical reaction, no new atoms are created, and no atoms are destroyed. 

• true
• false

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

A chemical change is different than a physical change because in a chemical change

• Chemicals are used
• Molecules do not physically touch
• A new substance is formed and in a physical change no new substance is formed
• The change can be seen but in a physical change it cannot

Tags

NGSS.MS-PS1-2

Students react baking soda & vinegar.
Which of the following would provide the evidence that the number of atoms present before a chemical reaction is equal to the number of atoms present after the chemical reaction?

• The mass of the plastic bag, baking soda, and vinegar before the reaction was equal to the mass after the reaction.

• Bubbles were produced during the reaction, which meant that a gas was being produced.

• The plastic bag did not change in any way, indicating that it was not involved in the reaction.

• The mass of the baking soda was exactly equal to the mass of the vinegar used to create the chemical reaction.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

What type of reaction is shown below?
A + B --> AB

• Synthesis

• Decomposition

• Photosynthesis

• Combustion

What type of reaction is shown below?
AB --> A + B

• Synthesis

• Decomposition

• Combustion

• None of these

Which of the following is a chemical change?

• Baking soda and vinegar producing gas bubbles
• A chocolate bar melting
• Powdered lemonade dissolving in water
• Frosting a cake

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5