Balancing Equations

The Law of Conservation of matter states that the total amount of matter ______________ after it undergoes change.

• disappears
• stays the same
• weighs less
• explodes

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

What is the Law of Conservation of mass?

• Mass is created in a chemical reaction
• Mass is created in a physical change
• New chemicals formed from a chemical reaction have a larger overall mass than the original reactants
• Mass is never created or destroyed

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

The coefficient in  3H₂O is

• 6
• 2
• 3
• 5

Tags

NGSS.MS-PS1-1

Which of the following are Subscripts in this Chemical Formula: 3Fe₂O₄

• 3,4

• 3,2

• 2,4

• 6

Tags

NGSS.MS-PS1-1

How many Hydrogen are in 4H₂O?

• 6
• 8
• 2
• 4

Tags

NGSS.MS-PS1-1

How many Sodium (Na) are in 6NaCl?

• 1
• 12
• 6

Tags

NGSS.MS-PS1-1

How many Sodium (Na) are in 6NaCl?

• 1
• 12
• 6

Tags

NGSS.MS-PS1-1

Number of N in (NH₄)₂CrO₄

• 1

• 2

• 8

• 16

Tags

NGSS.MS-PS1-1

Which of the following has the most number of O?

• 2Mg₃(PO₄)₂
• 4AlPO₄
• 3Al(NO₃)₃
• 15KOH

How many Nitrogen atoms are in the in 5 H₂C₃O₄N₅?

• 5

• 100

• 20

• 25

Tags

NGSS.MS-PS1-1