Chemical Equations

• element
• compound
• mixture of elements
• mixture of compounds

Tags

NGSS.MS-PS1-1

• element
• compound
• mixture of elements
• mixture of compounds

Tags

NGSS.MS-PS1-1

• element
• compound
• mixture of elements and compounds
• mixture of compounds

Tags

NGSS.MS-PS1-1

What is the correct term for a substance made up of two or more elements that are chemically bonded together?

• element

• compound

• mixture of elements and compounds

• mixture of compounds

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-2

What is the best description of a substance?

• A) element

• B) compound

• C) mixture of elements and compounds

• D) mixture of compounds

Tags

NGSS.MS-PS1-1

What is the Law of Conservation of Mass?

• It states that no matter can be created or destroyed.

• It states that no energy can be created or destroyed.

• It states that matter can be created or destroyed.

• It states that no sound can be created or destroyed.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Is the following reaction balanced?
NaHCO₃ --> Na₂CO₃ + H₂O + CO₂

• yes

• no

Tags

NGSS.MS-PS1-5

Why do people use coefficients?

• to help multiply the equation

• for the equation to be unbalanced

• to subtract

• to balance equations

Tags

NGSS.MS-PS1-5

How does oxygen become an oxide ion?

• it loses 2 electrons

• it gains 2 electrons

• it shares electrons

• it releases energy

Tags

NGSS.MS-PS2-3

How does calcium become an calcium ion?

• it loses 2 electrons

• it gains 2 electrons