Equation 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.HS-PS1-7

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

• 3
• 4
• 6
• 18

Tags

NGSS.MS-PS1-1

Balance this equation

_Al +_HCl --> _H₂ +_AlCl₃

• 2,6,3,2

• it's already balanced

• 4,12,3,4

• 2,1,4,5

Tags

NGSS.HS-PS1-7

The numbers needed to balance the equation are:

• 2, 7, 6, 4
• 2, 1, 3, 2
• 1, 1, 3, 2
• 2, 3, 1, 3

Tags

NGSS.HS-PS1-7

The numbers needed to balance the equation are:

• 1, 1, 1, 2
• 1, 1, 2, 2
• 1, 1, 1, 1
• 2, 3, 1, 3

Tags

NGSS.HS-PS1-7

The numbers needed to balance the equation are:

• 2, 7, 6, 4
• 2, 1, 3, 2
• 3, 1, 1, 3
• 2, 3, 1, 3

Tags

NGSS.HS-PS1-7

The numbers needed to balance the equation are:

• 2, 7, 6, 4
• 2, 1, 1, 2
• 3, 1, 1, 3
• 1, 6, 2, 6

Tags

NGSS.HS-PS1-7

The numbers needed to balance the equation are:

• 2, 7, 6, 4

• 2, 3, 1, 6

• 3, 1, 1, 3

• 1, 6, 2, 6

Tags

NGSS.HS-PS1-7

The numbers needed to balance the equation are:

• 2, 7, 6, 4
• 2, 3, 2, 6
• 4, 3, 1, 12
• 1, 6, 2, 6

Tags

NGSS.HS-PS1-7

What coefficient is missing in the following balanced chemical equation: 2Ni₂O₃ >>> 4Ni + __O₂

• 2

• 3

• 4

• 5

Tags

NGSS.MS-PS1-5