Balancing Chemical Equations

How many HCl molecules do you need to balance this equation? 
Mg +  __HCl --->  MgCl₂ + H₂

• 1
• 2
• 3
• 4

Tags

NGSS.MS-PS1-5

Pb(NO₃)₂  +  KI --> PbI₂ + KNO₃
What type of reaction is this? 

• Synthesis 
• Decomposition 
• Single Replacement
• Double Replacement 

Tags

NGSS.MS-PS1-2

What law governs the balancing of chemical equations? 

• Law of Energy
• Law of Conservation of Matter/Mass
• Law of Gravity
• Law of Matter Movement 

Tags

NGSS.MS-PS1-5

Balance this equation: _Zn + _O2 --> _ZnO

• 1, 1, 2

• 2, 1, 2

• 1, 1, 1

• 2 ,2, 2

Tags

NGSS.MS-PS1-5

Which side of the yield sign are the reactants found?

• to the left

• to the right

• in the middle

Which side of the arrow are the products found?

• to the left

• to the right

• in the middle

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

How many water molecules do you need to balance the equation: __H20 --> 2H2 + O2?

• 1

• 2

• 3

• 0

Tags

NGSS.MS-PS1-5

What is the right ratio of chemicals for the BCE (Balanced Chemical Equation)?__Al + __O₂--> __Al₂O₃

• 4,1 --> 2
• 4,3 --> 4
• 3,4 --> 1
• 4,3 --> 2

Tags

NGSS.MS-PS1-5

What is the right ratio of chemicals for the BCE (Balanced Chemical Equation)?__MnO₂ + __HCl --> __MnCl₂ + __H₂O __Cl₂

• 4,1 --> 2,1,2
• 1,2 --> 1,1,4
• 1,4 --> 1,2,1
• 1,4 --> 2,2,1

Tags

NGSS.MS-PS1-5

What is the right ratio of chemicals for the BCE (Balanced Chemical Equation)?__FeCl₃ + __Ca(OH)₂ --> __Fe(OH)₃ + __CaCl₂

• 4,3--> 2,1
• 3,2 --> 3,1
• 2,3 --> 2,2
• 2,3 --> 2,3

Tags

NGSS.MS-PS1-5