Balancing Chemical Equations

In this image, the symbols in red are called the_______.

• Products
• Reactants
• Subscripts
• Coefficients

In this image, the symbols to the right of the arrow (in black) are called the_______.

• Products
• Reactants
• Subscripts
• Coefficients

Tags

NGSS.HS-PS1-7

Consider the following: 2 C₆H₁₂O₆. How many carbon atoms are shown?

• 12
• 6
• 8

Tags

NGSS.MS-PS1-1

Balance this equation...
H₂ + Cl₂ --> HCl

• It is balanced 
• 3H₂ + Cl_{2 -->} 6H₂Cl
• H₂ + Cl_{2 -->} 2HCl

Tags

NGSS.HS-PS1-7

Which of the following shows the correct way to balance the chemical equation?
Fe + O₂ -> Fe₂O₃

• 4Fe + 3O₂ -> 2Fe₂O₃
• 2 Fe + 3O₂ -> Fe₂O₆
• 4 Fe + O₆ -> 2Fe₂O₃
• None of the options are correctly balanced.

Tags

NGSS.HS-PS1-7

_Na₃PO₄₊_KOH   --->
_NaOH + _ K₃PO₄

• Na₃PO₄+3 KOH
  --->
  3 NaOH +  K₃PO₄
• 2 Na₃PO₄+2 KOH
  --->
  3 NaOH +   K₃PO₄
• Na₃PO₄ + 2 KOH
  --->
  2 NaOH +   K₃PO₄
• 3 Na₃PO₄ + 3 KOH
  --->
  3 NaOH +  K₃PO₄

Tags

NGSS.HS-PS1-7

NGSS.HS-PS1-2

Balance this equation.
_CF₄ + _Br₂ -- _CBr₄ + _F₂

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

Tags

NGSS.HS-PS1-7

Which of the following is an unbalanced equation?
(Check ALL answers)

• CaCO₃ --> CaO + CO₂
• PbO₂ + 2H₂--> Pb + 2H₂O

• 2Na+ 2H₂O-->2NaOH + H₂
• CS₂ + 2O₂ --> CO₂ + 2SO₂

Tags

NGSS.HS-PS1-7

Which problem is balanced?
(Check ALL answers)

• PbO₂ + 2H₂
• SO₂ + H₂0 --> H₂SO₄
• 2Na + 2H₂O --> 2NaOH + H₂

Tags

NGSS.HS-PS1-7

Which coefficients balance this equation:
NH₃  +  O₂ ---->   NO  + H₂O

• 2,3,5,6
• 5,5,4,6
• 4,6,4,5
• 4,5,4,6

Tags

NGSS.HS-PS1-7