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2 years ago

What is the most metallic character with low ionization energies

Chemistry

1 answer:

Nat2105 [25]2 years ago

4 0

Answer:

Metals tend to lose electrons in chemical reactions, as indicated by their low ionization energies. Within a compound, metal atoms have relatively low attraction for electrons, as indicated by their low electronegativities.

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When scientists obtain new information, what happens to an existing scientific theory?

emmasim [6.3K]

Answer:

It is reevaluated

Explanation:

Because of this new evidence, the theory can change, so the scientists must reevaluate the theory

3 0

4 years ago

21. In infrared spectroscopy, absorption of electromagnetic radiation results in transitions between ________ energy levels.

Slav-nsk [51]

In infrared spectroscopy, absorption of electromagnetic radiation results in transitions between <u>Vibrational </u>energy levels.

<h3>What does spectroscopy mean?</h3>

Definition of spectroscopy Spectrum analysis is the study and measurement of the spectrum that matter emits when it interacts with electromagnetic (EM) radiation. It is the investigation of how frequency or wavelength affects the relationship between matter and radiation.

The various forms of spectroscopy include the following:

Acoustic resonance: A type of spectroscopy that primarily uses the ultrasonic and sonic ranges of sound. It is a popular, affordable approach for classifying and valuing materials.
X-ray photoelectron: This technique makes use of the diffraction patterns that X-rays produce as they travel through crystalline materials. The nature of the crystal structure can be inferred from these patterns.
You can use circular dichroism, a type of light absorption spectroscopy, to determine how differently a sample absorbs left- and right-circularly polarized light.
It is appropriate for exploring the electronic structure of molecules and detecting the compounds present. Ultraviolet-Visible (UV/Vis) Spectroscopy. It aids in the recognition of peptide bonds, coenzymes, side chains of amino acids, and prosthetic groups.
NMR Spectroscopy: This technique uses nuclear magnetic resonance to measure the magnetic fields surrounding the nuclei. Radio waves are used to excite atomic nuclei in a material.
Spectroscopy of the infrared range of the electromagnetic spectrum is known as infrared spectroscopy. Longer wavelengths and lower frequencies are found in infrared photons, and in infrared spectroscopy, the idea of absorption spectroscopy is used.
Raman spectroscopy is a method of spectroscopy used to examine low-frequency system modes such as rotational, vibrational, and other modes.

Learn more about Spectroscopy here:-

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5 0

2 years ago

A thermos contains 150 cm3 of coffee at 85 ????C. To cool the coffee, you drop two 11-g ice cubes into the thermos. The ice cube

NNADVOKAT [17]

Answer:

73.73°C is the final temperature of the coffee.

Explanation:

Heat lost by the coffee = Q

Mass of the coffee = m

Volume of coffee = V = $150 cm^3=150 mL (1cm^3=1 mL)$

Density of water = Density of coffee solution = d = 1 g/mL (given)

$Mass =density\times volume$

$m=1 g/mL\times 150 mL=150 g$

Heat capacity of the coffee is equal to that of water= c = 4.18 J/g°C

Initial temperature of the coffee = $T_1=85^oC$

Final temperature of the coffee = T

$Q=mc\times (T-T_1)$

Heat required to melt 11 grams of melt ice = Q'

Latent heat of ice = $\Delta H_{lat}=334 J/g$

$Q'=334J/g\times 11g=3674 J$

Heat absorbed by the ice after melting = q

Mass of ice melted into water = m' = 11 g

Heat capacity of water = c = 4.18 J/g°C

Initial temperature of water = $T_2$ = 0°C

Final temperature of water = T

$q=m'\times c\times (T_2-T)$

According law of conservation of energy , energy lost by coffee will equal to heat required to melt ice and further to raise the temperature of water.

$-Q=Q'+q$