Balancing and Types of Reactions CHEM

Which reaction below shows aluminum reacting with iron (III) oxide to produce iron and aluminum oxide?

• Al₂O₃ + 2 Fe → 2Al + Fe₂O₃

• 2Al + Fe₂O₃ → 2Fe + Al₂O₃

• Al → Fe₂O₃ + Al₃O₃

• Al₂O₃ + Fe₂O₃ → Al + Fe

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Look at the chemical reaction: 4 P + 5 O₂ → P₂O₅. Does it obey the law of conservation of mass?

• yes, it is properly balanced

• no, you need more phosphorus atoms on the reactant side

• no, you need more oxygen atoms on the product side

• no, you need more phosphorus and oxygen atoms on the product side

Tags

NGSS.MS-PS1-5

__Pb(NO₃)₂ + __NaI --> __NaNO₃ + __PbI₂

Which of the following sets of coefficients correctly balances the above chemical equation?

• 1:2:1:2

• 2:1:2:2

• 1:2:2:1

• 1:1:1:1

When the equation _____Fe + _____Cl₂ → _____FeCl₃ is balanced, the coefficient for Cl₂ is:

• 1

• 2

• 3

• 4

Which of the answer choices below correctly shows the products of the double replacement reaction shown below? BaCl₂ + Na₂SO₄ → ______ + _______

• BaSO₄ + NaCl

• Cl₂Ba + SO₄Na₂

• Cl₂SO₄ + BaNa₂

• BaCl₂ + Na₂SO₄

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Identify the type of chemical reaction

• Synthesis

• Decomposition

• Single replacement

• Double replacement

• Combustion

• Synthesis (aka "Combination" Reaction

• Decomposition Reaction

• Single Replacement Reaction

• Double Replacement Reaction

• Combustion Reaction

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.

Tags

NGSS.MS-PS1-5

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

• products
• reactants
• yield
• chemical formula

Tags

NGSS.MS-PS1-1

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

• Coefficient 
• Subscript
• Atom
• Equation