Heptane has nine structural isomers are 2-methylhexane, 3-methylhexane, 2,2-dimethylpentane, 2,3-dimethylpentane, 2,4-dimethylpentane, 3,3-dimethylpentane, 3-ethylpentane and 2,2,3-trimethylbutane. Each compound must have the same molecular formula but the structure of each are different from each other.
Answer:
a.
b.
Explanation:
a. First, we solve the specific heat equation as follows:
b. Then, we use the molar mass of titanium to determine its molar heat capacity, as follows:
Boron tribromide = bBr3
mol = mass/mr
mol=3/10.811+3(79.904)
= 0.018772527032439
Answer:
-252.5 kJ/mol = ΔH H2O(g)
Explanation:
ΔH Fe2O3 = -825.5kJ/mol
ΔH H2 = 0kJ/mol
ΔH Fe = 0kJ/mol
Based on Hess's law, ΔH of a reaction is the sum of ΔH of products - ΔH of reactants. For the reaction:
Fe2O3(s) + 3 H2(g) →2Fe(s) + 3 H2O(g)
ΔHr = 67.9kJ/mol = 3*ΔH H2O + 2*ΔHFe - (ΔH Fe2O3 + 3*Δ H2)
67.9kJ/mol = 3*ΔH H2O + 2*0kJ/mol - (ΔH -825.5kJ/mol + 3*Δ H2)
67.9 = 3*ΔH H2O(g) + 825.5kJ/mol
-757.6kJ/mol = 3*ΔH H2O(g)
<h3>-252.5 kJ/mol = ΔH H2O(g)</h3>
Answer:
It is a single replacement reaction because copper replaces silver within a compound as copper is higher than silver in the activity series.
Explanation:
A single replacement reaction occurs between an element and a compound, therefore since copper is an element and sliver nitrate is compound, it is single replacement. This reaction occurs because copper is higher in the activity series then silver.