Chem Post 2

The equation below is what type of reaction?

Pb(NO₃)₂ (aq) + 2NaI (aq) → PbI₂(s) + 2NaNO₃(aq)

• Double Replacement

• Decomposition

• Single Replacement

• Synthesis

What are the products in the reaction shown below?

HCl + NaOH→

• Na+Cl₂

• 
  NaCl+OH

• NaOH + Cl

• 
  NaCl+H₂O

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

The unbalanced equation below shows the combustion of methane. ___ CH₄ + ___ O₂ → ___ CO₂ + ___ H₂O Which series of numbers represents the coefficients necessary to balance the equation?

• 2, 2, 1, 4

• 1, 1, 1, 2

• 1, 2, 1, 2

• 0, 3, 2, 2

Tags

NGSS.HS-PS1-7

How many liters of carbon dioxide gas at STP are produced by the combustion of 64.0 g of methanol?

• 11.2 L

• 22.4 L

• 44.8 L

• 89.6 L

What is the correct formula for potassium sulfite?

• KHSO₃

• KHSO₄

• K₂SO₃

• K₂SO₄

Write the unbalanced equation for aluminum bromide reacting with rubidium acetate.

( I will show you this

• AlBr + RbC₂H₃O₂ --> AlC₂H₃O₂ + RbBr

• AlBr₃ + RbC₂H₃O₂ --> Al(C₂H₃O₂)₃ + RbBr

• AlBr₃ + RbC₂H₃O₂ --> AlRb + BrC₂H₃O₂ 

• 
  AlBr₃ + RbC₂H₃O₂ --> AlRb₃ + BrC₂H₃O₂

Write an unbalanced reaction for this reaction: fluorine reacts with potassium bromide.

• 
  F + KBr --> K + FBr

• F₂ + KBr --> F₂K₃ + Br

• F₂ + KBr --> KF + Br

• 
  F₂ + KBr--> KF + Br₂

What type of reaction is this? BaCO₃ --> BaO + CO₂

• double replacement

• single replacement

• synthesis

• decomposition

What is the correct name for the compound CoCl₂?

• cobalt (I) chlorate

• cobalt (II) chloride

• cobalt (III) chloride

• cobalt chloride

Aqueous lead II nitrate, Pb(NO₃)₂, is mixed with potassium iodide, KI. Which of the following is an expected product?

• 
  PbI₂(s)

• KNO₃(s)

• Pb(NO₃)₂(s)

• KI(s)

Tags

NGSS.HS-PS1-2