7 multiple choice 1 point which of the follow...
7 multiple choice 1 point which of the following reactions is an example of a single - replacement reaction? naoh + hcl → nacl + h₂o 4fe(oh)₂ + o₂ → 4fe(oh)₃ co₂ → c + o₂ 2agno₃ + cu → cu(no₃)₂ + 2ag clear my selection
Answer
# Answer:
2AgNO₃ + Cu → Cu(NO₃)₂ + 2Ag
# Explanation:
## Step1: Analyze the first reaction
NaOH + HCl → NaCl + H₂O is a double - replacement reaction (acid - base neutralization).
## Step2: Analyze the second reaction
4Fe(OH)₂ + O₂ → 4Fe(OH)₃ is a combination reaction.
## Step3: Analyze the third reaction
CO₂ → C + O₂ is a decomposition reaction.
## Step4: Analyze the fourth reaction
2AgNO₃ + Cu → Cu(NO₃)₂ + 2Ag: In a single - replacement reaction, one element replaces another in a compound. Here, Cu (a metal) replaces Ag (a metal) in AgNO₃. The general form of a single - replacement reaction is \(A+BC\rightarrow AC + B\) (where \(A\) and \(B\) are metals or \(A\) is a non - metal and \(B\) is a non - metal). In \(2AgNO₃+Cu\rightarrow Cu(NO₃)₂ + 2Ag\), \(A = Cu\), \(B = Ag\), and \(BC=AgNO₃\), \(AC = Cu(NO₃)₂\).