Structural isomerism is based on the existence of different molecular
structures formed by the same elements.
The statement that is not correct with respect to structural isomers is; <u>All </u>
<u>structural isomers show hydrogen bonding</u>.
Reason:
Structural isomers are isomers that have different molecular structures but
the same molecular formula. They are referred to as constitutional isomers
Therefore;
- The empirical formula which is obtainable from the molecular formula is the same for structural isomers.
- The structural formula of structural isomers are different
- Structural isomers that are functional isomers have different chemical properties.
However;
- Structural isomers that are linkage isomers may not have hydrogen bonding.
Therefore, the statement that is not correct with respect to structural isomers is; <u>All structural isomers show hydrogen bonding</u>.
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<em>The question options are;</em>
<em>The same empirical formula among structural isomers</em>.
<em>Different physical and chemical properties can be possessed by structural isomers</em>.
<em>Structural isomers have different structural formulas</em>.
<em>Hydrogen bonding is shown in all structural isomers</em>.
<em>All the above statements are correct</em>.
Answer:
b. 101.02°C
Explanation:
The elevation of boiling point in a solvent due the addition of a solute is a colligative property called <em>Boiling point Elevation. </em>The formula is:
ΔT = Kb*m*i
<em>Where ΔT is change in boiling point</em>
<em>Kb is boilinig point elevation constant = 0.512°C/m for water</em>
<em>m is molality of the solution = 0.50m</em>
<em>And i is Van't Hoff Factor (4 for the Al(NO₃)₃ because its disolution produce 4 ions)</em>
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Replacing:
ΔT = 0.512°C/m*0.50m*4
ΔT = 1.02°C
As the boiling point of pure water is 100°C and the increasing is of 1.02°C, boiling point of the solution is:
101.02°C
Right option is:
<h3>b. 101.02°C</h3>
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Answer:
4.44 M
Explanation:
The absorbance of a solution is a function of its concentration through the equation, known as Beer's law, as:
A = ε c l
where A is the absorbance, ε is is a constant of proportionality called molar absorptivity in units of L/mol·cm, c is the concentration in mol/L (M), and l is the length of the cuvette we use to measure the absorbance, usually 1 cm.
Now the above equation is a function of c in the form y= mx + b, which is exactly the linear relationship stated in the question.
Therefore
y = 0.0425 + 0.011
A = (εl) c
Therefore
slope = m = ε (1) = 0.0425
Knowing ε we can calculate the concentration of the diluted unknown:
0.200 = 0.0425 c + 0.011
c = (0.200 - 0.011)/0.425 = 0.44 M
This the concentration of the diluted solution, the original concentration of the unknown solution can be calculated from the formula V₁M₁ = V₂M₂
calling M₁ our undiluted solution, we have
M₁ = V₂M₂/V₁ = 50 mL x 0.44 M / 5.00mL = 4.44 M
(Notice there is no need to convert the volume to liters in the above equation since they appear in both sides of the equation and so they cancel each other).
Answer:
C) CH4 (g) + O2 (g)→ CO2 (g) + H2O (g)
Explanation:
Methane burns in the presence of air to give carbondioxide and water.
Also, All Alkanes combust in the presence of Oxygen to give carbondioxide and water.