Chemical Reactions and Balancing Equations

What is law of conservation of mass ?

• Mass of reactants = mass of products

• mass of reactants > mass of the products

• mass of the reactants < mass of the products

• mass of reactants > 2 mass of the reactants

Tags

NGSS.MS-PS1-5

NGSS.MS-PS1-2

Consider the chemical equation CH₄ + 2 O₂ → CO₂ + 2 H₂O. In this equation, CH₄ is a

• product
• reactant
• displacement

Tags

NGSS.MS-PS1-5

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

• Reactants
• Products 
• Yields 
• Chemical Equation 

Tags

NGSS.MS-PS1-5

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

• Reactants
• Products 
• Yields 
• Chemical Equation 

2H₂ + O₂ ----> 2H₂O What is the product?

• ------>
• 2H₂O
• 2H₂+ O₂

Tags

NGSS.MS-PS1-2

In the reaction methane + oxygen turns into carbon dioxide + water, the methane and oxygen are called _______________.

• reactants
• products
• neutrals
• energizers

The reactants are on the left side of the chemical equation.

• True
• False

Tags

NGSS.MS-PS1-5

Does this follow the law of conservation of mass:

Yes No

• Yes

• No

Tags

NGSS.MS-PS1-5

NGSS.MS-PS1-2

Does this follow the law of conservation of mass:

Yes No

• Yes

• No

Tags

NGSS.MS-PS1-5

NGSS.MS-PS1-2

Does this follow the law of conservation of mass:

Yes No

O_{3 --->} O + O₂

• Yes

• No

Tags

NGSS.MS-PS1-5

NGSS.MS-PS1-2