Balancing Chemical Equations Practice

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-PS1-2

NGSS.MS-PS1-5

How many Mn atoms are found in the following compound?
3Cr(MnO₄)₆

• 3
• 4
• 6
• 18

Tags

NGSS.MS-PS1-1

__ P₄ + __ O₂ -----> ____P₂O₅

• 1, 5, 2

• 2, 5, 7

• 2, 1, 5

• 5, 1, 2

Tags

NGSS.MS-PS1-5

___ Al + ___ Br₂ -----> ____ AlBr₃

• 3, 2, 2

• 2, 3, 2

• 3, 2, 2

• 1, 2, 3

Tags

NGSS.MS-PS1-5

___ Cr + ___O₂ -----> ____ Cr₂O₃

• 3, 2, 4

• 2, 3, 4

• 2,1, 5

• 4, 3, 2

Tags

NGSS.MS-PS1-5

___ NaClO₃ ----> ___ NaCl + ___ O₂

• 1, 3, 2

• 2,3,2

• 2, 2,3

• 3, 2, 2

Tags

NGSS.MS-PS1-5

___ AlBr₃ + ___ Cl₂ ----> ___ AlCl₃ +_{___} Br₂

• 2, 2, 3, 3

• 2, 3, 2, 3

• 2, 3, 3, 2

• 1, 2, 3, 4

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

___ H₂ +___O_{2 ----> ____} H₂O

• 1, 2, 2

• 2, 2, 1

• 1, 2, 3

• 2, 1, 2

Tags

NGSS.MS-PS1-5

____ H₂ + ____ N₂ ----> ____ NH₃

• 1, 2, 3

• 3, 1, 2

• 3, 2, 1

• 1, 3, 2

Tags

NGSS.MS-PS1-5

____ KClO₃ ----> ____ KCl + ____ O₂

• 3, 2, 2

• 2, 3, 2

• 2, 2, 3

• 2, 3, 4

Tags

NGSS.MS-PS1-5