chemical reactions and balancing

Which of the following is an example of synthesis?

• Na + Br₂ --> NaBr
• KClO₃ --> KCl + O₂
• HgO + Cl₂-->HgCl + O₂
• Cl₂ + NaBr --> NaCl + Br₂

Tags

NGSS.MS-PS1-5

Which reaction type is the following: AgF + CaCl₂ --> AgCl + CaF₂

• Decomposition
• Single Replacement
• Synthesis
• Double Replacement

Balance this reaction:

____ Na₃PO₄ + ____ KOH ---> ____ NaOH + ____ K₃PO₄

• 1,3,3,1

• 1,3,2,1

• 2,3,3,1

• 1,1,3,1

Tags

NGSS.HS-PS1-7

Balancing this reaction:

____ CH₄ + ____ O₂ ---> ___ CO₂ + ____ H₂O

• 2,1,3,1

• 1,2,1,2

• 1,2,2,1

• 2,1,1,2

Tags

NGSS.HS-PS1-7

The substances at the beginning of a chemical equation are called the ____

• product
• yield
• chemical symbol
• reactants

Tags

NGSS.MS-PS1-5

Which of the following is an example of a decomposition reaction?

• 
• 
• 
• 

Tags

NGSS.MS-PS1-2

Which of the following is an example of a single replacement reaction?

• 
• 
• 
• 

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

When balancing a chemical equation, you can only change _________, you can never change _______!

• coefficients, subscripts

• subscripts, coefficients

• formulas, subscripts

• coefficients, formula units

Tags

NGSS.HS-PS1-7

Why must the number of atoms on either side of the arrow be equal to each other in a chemical equation?

• to abide by the law of conservation of energy

• to abide by law of conservation of mass

• to abide by the law of fundamental equations

• because everything must be even for the universe to stay in balance

Tags

NGSS.HS-PS1-7

_AgNO₃ + _Cu →_Cu(NO₃)₂ + _Ag

• 2 AgNO₃ + 2 Cu → 3 Cu(NO₃)₂ + 1 Ag
• 2 AgNO₃ + 1 Cu → 1 Cu(NO₃)₂ + 2 Ag
• 1 AgNO₃ + 2 Cu → 2 Cu(NO₃)₂ + 1 Ag
• 3 AgNO₃ + 2 Cu → 3 Cu(NO₃)₂ + 2 Ag

Tags

NGSS.HS-PS1-7