Please answer all 4 ill leave a thumbs up

reaction type can only be single or double displacement reaction, observation part not necessary

6. Aqueous nickel(II) nitrate + aqueous sodium hydroxide Reaction Type: Observations: Product Names & States (if none, why not?): Balanced Equation: 7. Copper metal + aqueous zinc nitrate Reaction Type: Observations: Product Names & States (if none, why not?): Balanced Equation: 8. Aqueous potassium chloride + aqueous silver nitrate Reaction Type: Observations: Product Names & States (if none, why not?): Balanced Equation: 9. Hydrochloric acid + aqueous sodium hydroxide Reaction Type: Observations: Product Names & States (if none, why not?): Balanced Equation