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

__ P₄ + __ O₂ -----> ____P₂O₅

• 1, 5, 2

• 2, 5, 7

• 2, 1, 5

• 5, 1, 2

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

___ Al + ___ Br₂ -----> ____ AlBr₃

• 3, 2, 2

• 2, 3, 2

• 3, 2, 2

• 1, 2, 3

Tags

NGSS.HS-PS1-7

___ Cr + ___O₂ -----> ____ Cr₂O₃

• 3, 2, 4

• 2, 3, 4

• 2,1, 5

• 4, 3, 2

Tags

NGSS.HS-PS1-7

___ NaClO₃ ----> ___ NaCl + ___ O₂

• 1, 3, 2

• 2,3,2

• 2, 2,3

• 3, 2, 2

Tags

NGSS.HS-PS1-7

____ H₂ + ____ N₂ ----> ____ NH₃

• 1, 2, 3

• 3, 1, 2

• 3, 2, 1

• 1, 3, 2

Tags

NGSS.MS-PS1-5

What state of matter is this substance?

• solid

• liquid

• gas

• aqueous

Tags

NGSS.HS-PS1-3

NGSS.HS-PS1-5

Identify the Reactants in this equation.

• A

• B

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Identify the number in blue.

• Product

• Reactant

• Coefficient

• Subscript

Tags

NGSS.MS-PS1-1

In what state is this substance?

• solid precipitate

• dissolved in water

• released as a gas

• liquid

Tags

NGSS.MS-PS1-4