balancing equations

Fill in the blanks with coefficient:

PCl₅+_ H₂O→_ HCl+H₃PO₄

• 4, 5

• 1, 6

• 3, 8

• 2,2

Tags

NGSS.MS-PS1-5

Which equation is balanced?

• PbO₂ + 2H₂--> H₂SO₄

• SO₂ + H₂0 --> H₂SO₄

• 2Na + 2H₂O --> 2NaOH + H₂

• 2Na + 2H₂O --> 2NaOH + H

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

What is a coefficient?

• The small number on the right of the chemical symbol.
• The large number to the left of a formula.

Tags

NGSS.MS-PS1-5

Balance this equation
_Zn+_HCl-->_ZnCl₂ +_H₂

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

Tags

NGSS.MS-PS1-5

Balance this equation.
_Mg + _Cl₂ --> _MgCl₂

• 1, 2,1
• already balanced
• 2,1,1
• 1,1,2

Tags

NGSS.MS-PS1-5

How many atoms of aluminum are on each side of the following equation: 4Al + 3O₂ --> 2Al₂ O₃

• 2
• 6
• 1
• 4

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-5

The blue numbers in the image below represent ________

• Charges
• coefficients
• subscripts
• none of the answers are correct

Tags

NGSS.MS-PS1-1

Number of H in 3(NH₄)₂CrO₄

• 4
• 6
• 8
• 24

Tags

NGSS.MS-PS1-1

Balance this equation:
P₄+O₂  -->  P₂O₃

• 3 P₄+ O₂ --> 2 P₂O₃
•  P₄+ O₂ --> 2 P₂O₃
•  P₄+ 3 O₂ --> 2 P₂O₃
•  P₄+ 2 O₂ --> 3 P₂O₃

Tags

NGSS.MS-PS1-5

How many Elements are in the compound C₂H₈O ?

• 2
• 1
• 3
• 0

Tags

NGSS.MS-PS1-1