Known as the cell's “command center,” the nucleus is a large organelle that stores the cell's DNA (deoxyribonucleic acid). The nucleus controls all of the cell's activities, such as growth and metabolism, using the DNA's genetic information.

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8 0

3 years ago

The absorption of infrared (IR) radiation results in vibrations in the molecules or ions that make up a chemical sample. Vibrati

balandron [24]

Answer:

the order of vibrational frequency is:

C ≡ N > C=N > C=S > S-C

Explanation:

The bond's vibration frequency is determined using the following equation:

$\zeta = \dfrac{1}{2 \pi c}\sqrt{\dfrac{k}{\mu}}$

where;

reduced mass $\mu = \dfrac{m_1m_2}{m_1+m_2}$

velcoity of light = c

force constant = k

The frequency of vibration, on the other hand, is inversely proportional to the atom's mass, because the heavier the atom, the lower the frequency.

In addition, the value of a bond's stretching frequency rises as the bond's intensity rises. As a result, the frequency is as follows:

triple > double > single

The reduced mass $(\mu)$ of C-N bond.

$\mu = \dfrac{m_1m_2}{m_1+m_2}$

$\mu = \dfrac{12*14}{12+14} \\ \\ \mu = 6.46$

The reduced mass of C-S bond;

$\mu = \dfrac{m_1m_2}{m_1+m_2}$

$\mu = \dfrac{12\times 32}{12+32} \\ \\ \mu = 8.72$

Thus, the order of vibrational frequency is:

C ≡ N > C=N > C=S > S-C

5 0

3 years ago

"During germination, the fertilized egg begins to sprout and grow. Each seed contains an embryo, or tiny plant, and it needs the

liubo4ka [24]

Answer:

See the answer below

Explanation:

Read the following passage and identify the error. During germination, the fertilized egg begins to sprout and grow. Each seed contains an embryo, or tiny plant, and it needs the right condition to grow. These conditions include the basic need of water, the correct temperature, and the right location, which is in the soil. Select the statement that corrects the error in the passage. Seeds are fertilized during germination, not before. Basic conditions include wind, not water. The fertilized egg begins to grow and mature, not an embryo. The fertilized seed begins to grow and sprout, not an egg.

<em>A typical seed consists of a fertilized ovule which forms the embryo. Double fertlization ensures that a structure, the endosperm, surrounds and provide nutrition to the embryo while in a state of inactivity. </em>

<em>During germination, the embryo sprouts and grows given the right conditions of moisture, air, temperature, and other factors that may vary from seeds to seeds.</em>

4 0

3 years ago