That which is NOT part of the respiratory membrane of the lungs is:
- A thin layer of ciliated epithelial cells
<h3>What is the respiratory membrane?</h3>
The respiratory membrane is the surface of the lungs where there is an exchange of gases. There are many parts that make up the respiratory membrane of the lungs.
Some of these are; the respiratory mucosa, the adventitia, and the submucosa. The thin layer of ciliated epithelial cells is not a part of the respiratory membrane but is a hair-like structure that helps to remove unwanted substances from the body.
So the correct answer is: a thin layer of ciliated epithelial cells.
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The value of kb of cyclohexane in the given question is; kb = 2.82 °C/m
<h3>Understanding Molality of a Solution</h3>
Molality of solution = (Number of moles of C₆H₄Cl₂)/(Mass of Cyclohexane)
Now;
Number of moles of C₆H₄Cl₂ = Mass/molar mass = 2g/147 g/mol
Number of moles of C₆H₄Cl₂ = 0.0136 mol
Molality of solution = 0.0136/(22.5 * 10⁻³ kg)
Molality of solution = 0.6 m
Now, to find kb for cyclohexane, we will use the formula;
T_b(solution) - T_b(solvent) = kb × molality of solution
Thus;
82.39 - 70 = kb * 0.6
kb = (82.39 - 70)/0.6
kb = 2.82 °C/m
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Answer:
least disadvantages and most advantages
Explanation:
Try to achieve a win-win solution
The specific heat of the given sample of metal is 14.32 J/kg.K.
<h3>What is the Specific heat of a sample?</h3>
The specific heat of a sample is the amount of heat needed or required to raise the temperature of that sample by 1K. It is given by the formula:
Q = mCΔT
where;
- Q = Heat transferred
- m = Mass of the substance
- C = Specific heat
- ΔT= Change in temperature.
Recall that:
weight of a substance = mass × gravity
- mass = 28.4 N/ 9.8 m/s²
- mass = 3 N/m/s² = 3 kg
From the equation:
Q = mCΔT
C = 14.32 J/kg.K
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