Unit 6 - Chemical Equations & Reactions (with Nomenclature)

In Cl₂, the 2 is known as

• the subscript.
• the coefficient.
• the molecular mass.
• the number of protons.

N_2, Cl_2, and O₂ are all 

• diatomic molecules.
• ionic bonds.
• of equal mass.
• solids.

A decomposition reaction can be represented as _____________________.

• AB  → A + B
• A + B → AB
• AB + CD → AC + BD
• A + BC → B + AC

The reaction Ca(s) + 2HCl(aq) -> H₂(g) + CaCl₂(aq) is a

• Single Replacement
• Double Replacement
• Decomposition
• Synthesis

Which equation represents a decomposition reaction?

• Cu +  2AgNO₃ --> 2Ag + Cu(NO₃)₂
• CaCO₃  --> CaO  +  CO₂
• KOH  +  HCl  --> KCl  + H₂O
• 2H₂  +  O_{2  -->} 2H₂O

What is the balanced equation when aluminum reacts with copper(II) sulfate?

• Al + CuSO₄ --> AlSO₄ + Cu
• 2Al + 3CuSO₄ --> Al₂(SO₄)₃ + 3Cu
• Al + Cu₂S --> Al₂S + Cu
• 2Al + Cu₂SO₄ --> Al₂SO₄ + 2Cu

Tags

NGSS.HS-PS1-7

NGSS.HS-PS1-2

When the equation Fe₃O₄ + Al --> Al₂O₃ + Fe is correctly balanced, what is the coefficient of Fe?

• 2
• 7
• 9
• 4

Tags

NGSS.HS-PS1-7

Given the balanced equations representing two chemical reactions:
1.    I₂ + 2 KBr --> 2ICl + Br₂
2.     2NaCl --> 2 Na + Cl₂
Which types of chemical reactions are represented by these equations?

• single replacement and double replacement
• synthesis and double replacement
• synthesis and decomposition
• single replacement and decomposition

The reaction 2KClO₃(s) --> 2KCl(s) + 3O₂(g) is a(n)

• Decomposition
• Synthesis
• Single Replacement
• Double Replacement

Which type of reaction is the following?
3C₃H₇OH + 9O₂  --> 6CO₂ + 8H₂O

• Double Replacement
• Decomposition
• Combustion
• Single Replacement