Chemistry Balancing Chemical Equations

• 3
• 2

Tags

NGSS.MS-PS1-5

Balance this equation ​ (a)   N₂ + ​ (b)   H₂ --> ​ (c)   NH₃

• 1
• 3
• 2

Tags

NGSS.MS-PS1-5

Balance this equation. _CF₄ + _Br₂ → _CBr₄ + _F₂

• 3,1,2,1

• 1,2,1,2

• 2,2,2,2

Tags

NGSS.MS-PS1-5

According to the Law of Conservation of Mass (Matter), Matter cannot be ​ (a)   or ​ (b)   , it can only be ​ (c)   . This means however many atoms of an element we have before a reaction must be ​ (d)   to the number after a reaction.

• created
• destroyed
• changed
• equal

Tags

NGSS.MS-PS1-5

What is the total number of atoms present in 5Na₃PO₄

• 5
• 40
• 55
• 8

Tags

NGSS.MS-PS1-1

What is the little number after an element in a chemical equation called.
Example: H₂

• Coefficient 

• Subscript

• Atom

• Equation

What is wrong with how this student balanced the equation?

Original equation: Ag + O_{2 --->} Ag₂O

Solution: Ag + O_{2 --->} 2Ag₂O

• They changed the molecular structure of the products/reactants.

• The silver (Ag) still isn't balanced.

• The oxygen (O) still isn't balanced.

• They left out the reactants.

Tags

NGSS.MS-PS1-5

What is a coefficient?

• The small number on the right of the chemical symbol.
• The large number in front of a chemical formula.
• The number in between the chemical symbols.
• The number behind a chemical formula.

What is the part of the chemical equation in green called? 
Fe + S --> FeS

• products
• reactants
• yield
• chemical formula

Tags

NGSS.HS-PS1-7

Which side of a chemical equation os the product side?

• Left (before the yields sign)
• Right (after the yields sign)