Stoichiometry And Stoichiometric Calculations

Step 1: Understanding the Concept:
Silver carbonate decomposes on heating to silver, CO , and O .

Step 2: Detailed Explanation:

Molar mass of Ag CO = g/mol.
2 mol (552 g) Ag CO gives 4 mol (432 g) Ag.
So, g Ag CO gives Ag = g.

Step 3: Final Answer:
2.16 g

Step 1: Understanding the Concept:
The reaction between calcium carbonate and hydrochloric acid is: .
Step 2: Detailed Explanation:
Moles of HCl = Molarity × Volume (in L) = mol. From the balanced equation, 2 moles of HCl react with 1 mole of . Moles of required = mol. Molar mass of = g/mol. Mass of = g 0.94 g.
Step 3: Final Answer:
The mass required is 0.94 g, option (A).

Step 1: Understanding the Concept:
This is a stoichiometry problem based on the precipitation reaction between calcium chloride and silver nitrate.
Step 2: Detailed Explanation:
The balanced chemical equation is: Molar mass of = g/mol. Moles of formed = mol. From the equation, 2 moles of are produced from 1 mole of . So, moles of required = mol. Molar mass of = g/mol. Mass of required = g.
Step 3: Final Answer:
The required mass of calcium chloride is 5.55 g, option (A).

Step 1: Understanding the Concept:
First, CO is produced from oxygen: . Then, CO reduces : . We need to find the mass of required for the CO that reacts with a given amount of .
Step 2: Detailed Explanation:
Molar mass of g/mol. Moles of in 1.6 kg (1600 g) = mol. From the reduction equation: 1 mole of requires 3 moles of CO. So, 10 moles of require moles of CO. From the formation of CO: 2 moles of CO are produced from 1 mole of . Thus, 30 moles of CO require moles of . Mass of required = g.
Step 3: Final Answer:
Hence, the required mass of oxygen is 480 g, which corresponds to option (B).

Step 1: Understanding the Concept:
The reaction is . Identify the limiting reagent.
Step 2: Detailed Explanation:
Molar mass of g/mol. g = mol. HCl: mL of solution = g HCl = mol. Limiting reagent is . mol produces mol g.
Step 3: Final Answer:
The amount of produced is g.

Step 1: Understanding the Concept:
.
Step 2: Detailed Explanation:
Moles of Mg = mol. Moles of MgO produced = 0.05 mol. Mass = g. Option (A) mol is correct.
Step 3: Final Answer:
mol of MgO is produced.

Step 1: Understanding the Concept:
For dibasic acid, n-factor = 2, equivalents of acid = equivalents of base.
Step 2: Detailed Explanation:
Moles of NaOH = mol. For dibasic acid, moles of acid = mol. Molar mass = g/mol.
Step 3: Final Answer:
The molecular mass is 128.