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AnnZ [28]
1 year ago
9

Phase change involves changing states of matter (solid-liquid-gas). How do these three states of matter differ from each other?

(on a molecular level)
Chemistry
1 answer:
Morgarella [4.7K]1 year ago
4 0

solid : the molecules are tightly packed

liquid : the molecules have some space in them

gas : molecules can freely move around

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Give the structure that corresponds to the following molecular formula and 1H NMR spectrum: C4H10O2: δ 1.36 (3H, d, J = 5.5 Hz);
kondor19780726 [428]

Answer:

For the determination of a structure through its NMR it is necessary to know its molecular formula as well as the delta values, its coupling and the shift of each signal.

The separation produced is called coupling constant J and is measured in Hz. If the split is produced by two equal protons (equal J) a triple signal known as triplet is produced and if produced by three equal protons, the signal is quadruple and is known as quadruplet. The magnitude of the coupling is varied, depending on the relative disposition of the coupled protons (elevations that separate them, arrangement, spatial arrangement)

OH CH2 CH2 CH2 CH2 OH

(A)   (B)   (C)

1,4-butanediol

In the case of the molecule to study the signal at 1.36 shows a doublet, which corresponds to the hydrogen (C), is split in two for each different proton on the same carbon or on neighboring carbons.

At 3.32 ocurrs a singlet, wich belong to hidrogen (B). The last signal is a quintet, at 4.63 belonging to the hydrogen (C)

Explanation

Nuclear magnetic resonance NMR is a physical phenomenon based on the mechanical-quantum properties of atomic nuclei. NMR also refers to the family of scientific methods that explore this phenomenon to study molecules, macromolecules, as well as tissues and whole organisms.

NMR takes advantage of the fact that atomic nuclei resonate at a frequency directly proportional to the force of a magnetic field exerted, in accordance with the Larmor precession frequency equation, to subsequently disturb this alignment with the use of an alternating magnetic field, of orthogonal orientation.

The behavior of the nuclei in the magnetic field can be influenced in multiple ways, to give different types of information, but the basic information obtained is:

  • Frequency at which each particular nuclei comes out, displacement.
  • Number of nucleis of each type, integral.
  • Number and arrangement of nearby nuclei, multiplicity.
6 0
2 years ago
A client with tongue occlusion has loss of gag reflex and alterations in level of consciousness. The blood gas test shows oxygen
siniylev [52]

Answer:

answer is given below

Explanation:

Upper airway obstruction with tongue closure may be associated with damage Changes in alertness and level of consciousness. Clients with severe hypoxia (O2)

Saturation of 40 mm Hg and this is an emergency for hypercapnic (CO2 saturation of 75 mm Hg)

Tracheotomy for relief in 2 minutes. Laryngeal repair is performed to prevent laryngeal.  

Cover cartilage cover. Clears the upper airway obstruction due to abdominal thrust maneuvering  Foreign body. Autoradiating positive airway pressure resets full pressure during breathing

Users with severe sleep apnea

7 0
3 years ago
There is a structure of CH3CH2CHCHCH2CH3, with a –CH2CH3 group attached to the third and fourth carbons.
NARA [144]

Explanation:

2,3-diethyl hexane

At first we select a long chain.

Then, we number that chain from that side where substituent position is closer.

Then, we write it's IUPAC name

Position of substituent + substituent name + chain name + suffix

Here,

2,3 + -diethyl + hex + -ane

= 2,3-diethyl hexane

7 0
2 years ago
An atom has two valence electrons, but four shells. This element is a member of which group or family?
Vesna [10]
The correct answer is C: the alkaline earth metals!
8 0
2 years ago
Beta particles cannot penetrate very far into solids because they _____.
givi [52]
Answer: Beta particles cannot penetrate very far into solids because they <span><u>have no mass.

</u>Reason<u>:
</u>Penetrating power of particle depending upon the velocity  and mass of particle. Greater the mass and velocity. Higher will be the penetrating power. In case of Beta particles, they are electrons. Mass of an electron is 9.1 X </span>10^{-31} Kg. Due to such negligible mass, they have very low penetrating power. <span /><span><u>
</u></span>
6 0
3 years ago
Read 2 more answers
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