Concept explainers
Interpretation:
The amount of ammonia gas formed when 1.25 g of ammonium carbonate decomposes needs to be deduced based on the given reaction.
Concept Introduction:
- A
chemical reaction is represented in terms of a chemical equation with the reactants on the left and the products on the right. - The coefficient of a balanced chemical equation i.e. the stoichiometry gives the amount of reactants and products involved in the reaction.
- Chemical equations can therefore be used to determine the amount of products formed from a known quantity of reactants.
Answer to Problem 21A
Mass of NH3 = 0.442 g
Explanation of Solution
The given reaction is:
The balanced equation is:
Step 1: Calculate the moles of Fe present:
Mass of (NH4)2CO3 present = 1.25 g
Molar mass of (NH4)2CO3= 96.09 g/mole
Step 2: Calculate the moles of NH3 formed:
Based on the reaction stoichiometry:
1 mole of ammonium carbonate forms 2 moles of NH3
Therefore, 0.0130 moles of ammonium carbonate would yield:
Step 3: Calculate the mass of NH3 formed:
Moles of NH3 formed = 0.026
Molecular weight of NH3 = 17 g/mol
Therefore, mass of NH3 formed is around 0.442 g.
Chapter 9 Solutions
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