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andre [41]
2 years ago
9

Which of the following is not a nanoscale object?

Chemistry
2 answers:
Mekhanik [1.2K]2 years ago
7 0

Answer:

The correct answer will be option-A muscle cell.

Explanation:

Nanoscales are the structures less than 100 nm in length which is considered a billionth of a meter scale.  The nanoscales lead to the formation of a new field of study called nanotechnology which finds its use in all perspectives of science.

In the given question, the nanoscale objects are enzymes (3-7) nm) length, the water molecule (0.275 nm), and xenon atom. Since the muscle cell length is usually measured in mm(1-40 mm)

Thus, option-A is the correct answer.

KiRa [710]2 years ago
6 0
If I am correct I would believe that it would be a muscle cell.
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En una determinación cuantitativa se utilizan 17.1 mL de Na2S2O3 0.1N para que reaccione todo el yodo que se encuentra en una mu
lozanna [386]

Answer:

La cantidad de yodo en la muestra es 0.217 g

Explanation:

Los parámetros dados son;

Normalidad de la solución de Na₂S₂O₃ = 0.1 N

Volumen de la solución de Na₂S₂O₃ = 17.1 mL

Masa de muestra = 0.376 g

La ecuación de reacción química se da de la siguiente manera;

I₂ + 2Na₂S₂O₃ → 2 · NaI + Na₂S₄O₆

Por lo tanto, el número de moles de sodio por 1 mol de Na₂S₂O₃ en la reacción = 1 mol

Por lo tanto, la normalidad por mol = 1 M × 1 átomo de Na = 1 N

Por lo tanto, 0.1 N = 0.1 M

El número de moles de Na₂S₂O₃ en 17,1 ml de solución 0,1 M de Na₂S₂O₃ se da de la siguiente manera;

Número de moles de Na₂S₂O₃ = 17.1 / 1000 × 0.1 = 0.00171 moles

Lo que da;

Un mol de yodo, I₂, reacciona con dos moles de Na₂S₂O₃

Por lo tanto;

0,000855 moles de yodo, I₂, reaccionan con 0,00171 moles de Na₂S₂O₃

La masa molar de yodo = 253.8089 g / mol

La masa de yodo en la muestra = 253.8089 × 0.000855 = 0.217 g.

5 0
2 years ago
If a Lys residue that interacts with 2,3-bisphosphoglycerate (BPG) in the central cavity of hemoglobin is changed to a Ser resid
masha68 [24]

Answer: Option (c) is the correct answer.

Explanation:

When there will be interaction between 2,3-bisphosphoglycerate (BPG) and Lys residue in the central cavity of hemoglobin then it will change into Ser residue. After that, the it will lead to less stable formation of deoxygenated state (T state).

Since, serine is not a charged amino acid therefore, it will lead to a decrease in the binding affinity of hemoglobin for 2,3-bisphosphoglycerate.

As a result, stability of the T state will decrease.

Thus, we can conclude that in the given situation the T state would be less stable.

3 0
2 years ago
Suppose a species of snake is living in a certain area. Some of the snakes in the population are black and some are orange. Over
nikdorinn [45]

The theory of biological evolution known as Darwin's theory of evolution or Darwinism given by Charles Darwin an English naturalist. According to the theory, all the species of organisms develop and originate via the natural selection of minor, inherited changes, which enhances the tendency of an individual to survive, compete, and develop the tendency to give rise to new ones.  

Thus, according to Darwin's theory of evolution in the given case of black and orange snakes, the black snakes will survive and reproduce, therefore, passing their traits to their offspring, while few orange snakes will remain in the population.  

6 0
2 years ago
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Americium-242 has a half-life of 6 hours. If you started with 24 g and you now have 3 g, how much time
kogti [31]
How many times has it halved?

24/2 = 12
12/2 = 6
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It halved three times.
It halves once every 6 hours.

18 hours have passed.
7 0
2 years ago
A cube of steel has dimensions 0.2 mx 0.2 m * 0.2 m. What is
never [62]

Answer: 800”

Explanation:

5 0
2 years ago
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