The reaction that exemplifies a double replacement reaction is as follows: K2S + CoCI2 -> 2KCI + CoS, which is option 1.
<h3>What is a double replacement reaction?</h3>
A double replacement reaction is a type of reaction in which two elements are substituted in the reacting compounds.
In the reaction given as follows:
K2S + CoCI2 -> 2KCI + CoS
- Pottasium replaces cobalt in Cobalt chloride
- Sulfur replaces chlorine in Cobalt chloride
Therefore, the reaction is a type of double replacement reaction.
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Answer:
16 g Ag
General Formulas and Concepts:
<u>Chemistry - Stoichiometry</u>
- Using Dimensional Analysis
<u>Chemistry - Atomic Structure</u>
Explanation:
<u>Step 1: Define</u>
[RxN] Cu (s) + AgNO₃ (aq) → CuNO₃ (aq) + Ag (s)
[Given] 25 g AgNO₃
<u>Step 2: Identify Conversions</u>
[RxN] 1 mol AgNO₃ = 1 mol Ag
Molar Mass of Ag - 107.87 g/mol
Molar Mass of N - 14.01 g/mol
Molar Mass of O - 16.00 g/mol
Molar Mass of AgNO₃ - 107.87 + 14.01 + 3(16.00) = 169.88 g/mol
<u>Step 3: Stoichiometry</u>
<u />
= 15.8744 g Ag
<u>Step 4: Check</u>
<em>We are given 2 sig figs. Follow sig fig rules and round.</em>
15.8744 g Ag ≈ 16 g Ag
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