Chemical Reactions

What does the Law of Conservation of Mass state?

• Matter cannot be gained or lost in a chemical reaction.
• Matter can only be lost in a chemical reaction.
• Matter can only be gained in a chemical reaction.
• Matter can be gained and lost in a chemical reaction. 

Tags

NGSS.MS-PS1-5

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 

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

• 3
• 6
• 12
• 24

Tags

NGSS.MS-PS1-1

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

• Yes!
• No!

Tags

NGSS.MS-PS1-5

The blue numbers in the image below represent ________

• I don't know, and don't want to try
• coefficients
• subscripts
• none of the answers are correct

The red numbers in the image below represent ________

• subscripts
• coefficients
• I don't know, and don't want to try
• None of the answers are correct

Tags

NGSS.MS-PS1-1

tiny pieces that matter (substances) is made of

• Adams

• atoms

• at 'ems

• molecules

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-5

letters & numbers that show the types of atoms that make a substance

• chemical formula

• recipe

• atomic ingredients

• periodic table

Tags

NGSS.MS-PS1-1

the substance made during a chemical reaction

• explosive

• product

• reactant

• molecule

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5