Answer:
ΔHr = -86.73 kJ/mol
Explanation:
Using Hess's law, you can calculate ΔH of any reaction using ΔH°f of products and reactants involed in the reaction.
<em>Hess law: ∑nΔH°f products - ∑nΔH°f reactants = ΔHr</em>
<em>-Where n are moles of reaction-</em>
For the reaction:
Fe³⁺(aq) + 3 OH⁻(aq) → Fe(OH)₃(s)
Hess law is:
ΔHr = ΔH°f Fe(OH)₃ - ΔH°f Fe³⁺ - 3×ΔH°f OH⁻
Where:
ΔH°f Fe(OH)₃: −824.25 kJ/mol
ΔH°f Fe³⁺: −47.7 kJ/mol
ΔH°f OH⁻: −229.94 kJ/mol
Replacing:
ΔHr = −824.25 kJ/mol - (−47.7 kJ/mol) - (3×-229.94 kJ/mol)
<em>ΔHr = -86.73 kJ/mol</em>
The empirical formula : C₁₁O₁₄O₃
<h3>Further explanation</h3>
The assumption of the compound consists of C, H, and O
mass of C in CO₂ =
mass of H in H₂O =
mass of O :
mass sample-(mass C + mass H)
mol of C :
mol of H :
mol of O :
divide by 0.0155(the lowest ratio)
C : H : O ⇒
Answer:
umm i believe that the one you chose is correct
Explanation:
The answer is A: biodegradable.
