Chemical Equations

The substances listed on the right side of a chemical equation are the

• Yields
• Reactants
• Products
• Precipitates

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

CaCO₃ represents a chemical

• Symbol
• Formula
• Subscript
• Reaction

Tags

NGSS.MS-PS1-1

The substances listed on the left side of a chemical equation are the

• Products
• Coefficients
• Precipitates
• Reactants

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

In chemical reactions, what does the principle of conservation of mass mean?

• Matter is not created or destroyed.
• The total mass of the reactants is greater than the total mass of the products.
• The total mass of the reactants is less than the total mass of the products.
• Matter is not changed.
  

Tags

NGSS.MS-PS1-5

Identify the reactant(s) and product(s) of the reaction.

• All three are reactants and none are products.
• Hydrogen and water are the reactants, and oxygen is the product.
• Water and oxygen are the reactants, and hydrogen is the product.
• Hydrogen and oxygen are the reactants, and water is the product.
  

Which of the following is evidence that a chemical change has taken place? 

• change in color
• change in size
• change in shape
• change in energy

Tags

NGSS.MS-PS1-2

When dry ice (solid carbon dioxide) sublimes it goes directly from a solid to a gas. What type of change is occurring? 

• Chemical change
• Physical change
• None of the above 

Tags

NGSS.MS-PS1-4

How many oxygen atoms are present in the following? 
4Ca(OH)₂

• 4
• 6
• 8
• 1

Tags

NGSS.MS-PS1-1

Which of the following is evidence that a chemical change has taken place? 

• change in color
• change in size
• change in shape
• change in energy

When dry ice (solid carbon dioxide) sublimes it goes directly from a solid to a gas. What type of change is occurring? 

• Chemical change
• Physical change
• None of the above