Answer:
Boiling point of the solution is 82.3°C
Explanation:
Boiling point elevation is defined as the increasing of a boiling point of a substance by the addition of a solute. The formula is:
ΔT = K×m×i
<em>Where ΔT is change in temperature (Final T - 80.1°C), K is boiling point elevation constant (2.53°C/m), m is molality of the solution (moles of naphthalene / kg of benzene) and i is Van't Hoff factor (1 for Naphthalene)</em>
Moles of 70.6g of naphthalene are:
70.6g × (1mol / 128.16g) = 0.5509 moles
Kg of 722mL of benzene are:
722mL × (0.877g / mL) × (1kg / 1000g) = 0.633kg of benzene
Replacing in boiling point elevation formula:
(T - 80.1°C) = 2.53°C/m×(0.5509mol / 0.633kg)×1
T - 80.1°C = 2.2°C
T = 80.1°C + 2.2°C
T = 82.3°C
<h3>Boiling point of the solution is 82.3°C</h3>
Answer:
physics, including the laws of gravity
Explanation:
Molarity is defined as the number of moles dissolved in 1 L of solution .2 mol of NaOH has been dissolved in a volume of 3 L.
we need to then find the number of NaOH moles dissolved in 1 L.
Molarity = number of moles / volume in L
Molarity = 2 mol / 3 L = 0.67 mol/L
Therefore molarity of NaOH - 0.67 M
Answer:
Answer: There are 9 ways to make a single base mismatch, 27 ways to make a two base pair mismatch and, again, 27 ways to make a three base pair mismatch (and only 1 way to do it correctly). Q = e − U i k b T i ∑ = e − U zeromismatches k b T + 9 × e − U onemismatche k b T + 27 × e − U twomismatches k b T + 27 × e − U threemismatches k b T = e 0 k b T + 9 × e − 10 kJ / mol k b T + 27 × e − 20 kJ / mol k b T 27 × e − 30 kJ / mol k b T = 1 + 9 × (0.018) + 27 × (0.00033) + 27 × (0.000006) = 1 + (0.163) + (0.0089) + (0.00016) =1.17 p 0 = e − U 0 k b T Q = e − 0 k b T 1.17 = 1 1.17 = 0.853 => 85.3% Therefore, approximately 85.3% of all amino acids are translated faithfully. The redundancy built into the genetic code and other energetic considerations raise this number considerably.
Explanation:
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