Unit 5-6 Review: Balancing, molar mass, types of reactions

What is the molar mass of NaOH?

• 40 g/mol
• 38.989 g/mol
• 23.998 g/mol
• 57.004 g/mol

Calculate the molar mass for Al(OH)₃

• 78.0 g/mol

• 72 g/mol

• 28 g/mol

• 25 g/mol

What is the mass of .072 mols of FeCl₃?

• 162.3 g

• 11.7 mols

• 11.7 g

• 11.7 g/mol

How many moles are in 2.35 g H₂O?

• 0.13 mols

• 13 mols

• 1.3 mols

• 130 mols

The following is what type of reaction:
PbCl₂ + AgNO₃ → Pb(NO₃)₂ + AgCl

• Combination/Synthesis

• Decomposition
• Single Displacement

• Double Displacement

The following is what type of reaction:
NH₃ + HCl  → NH₄Cl

• Combination/Synthesis

• Decomposition
• Single Displacement

• Double Displacement

What type of chemical reaction is this?
Al(OH)₃ → Al₂O₃  + H₂O

• Decomposition
• Combustion
• Combination/Synthesis

• Single Displacement 

3Ca + 2AlCl₃ --> 3CaCl₂ + 2Al

• Synthesis
• Decomposition
• Single Displacement
• Double Displacement

Is the equation balanced?: 2H₂O + O₂ --> 4MgO + 3Fe

• Yes
• No

What are the numbers that you CANNOT change in a chemical equation? 

• Coefficient
• Products
• Reactants
• Subscripts