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puteri [66]
4 years ago
10

You suspect that a sample of rock dates from about 200,000 years. If you want to determine the absolute day for this rock which

dating method would you choose
Chemistry
2 answers:
Illusion [34]4 years ago
7 0

Answer:

Relative dating is used to determine a fossils approximate age by comparing it to similar rocks and fossils of known ages. this might help u a little

laiz [17]4 years ago
3 0

<u>Answer:</u>

Potassium-argon dating can be used for the determination of Absolute day of the rock that dates from 200,000 years.

<u>Explanation:  </u>

Potassium-argon dating methodology that can be used for dating very ancient Archaeological materials. This method is used by geologists to date rocks that are 4 billion years old. The radioactive isotope of Potassium 40 (K-40) decays into the gaseous Argon (Ar-40).

The date on which the rocks were formed can be determined by comparing the ratio of Potassium 40 to gas Argon 40 in the volcanic rock sample along with rate at which K-40 is decayed.

You might be interested in
What was the original pressure in a rigid container if the new pressure is 82.5atm and the temperature was raised from 44C to 67
zhenek [66]

Answer: 54 atm

Explanation:

I did 67/82.5 then got 0.8121212121. I them divided 44 by 0.81212121 and got 54.1791044776

4 0
3 years ago
It is observed that the atoms of hydrogen in gas discharge tube emit radiations whose spectrum shows line characteristics (line
azamat

Answer: the line Spectra of hydrogen lies between the ultra-violet, visible light and infra-red of the electro magnetic spectrum

Explanation:

Electromagnetic radiation spans an wide range of wavelengths and frequencies. This range is called the electromagnetic spectrum. The electromagnetic spectrum is generally divided into seven regions, in order of decreasing wavelength and increasing energy and frequency. The 7 regions includes; radio waves, microwaves, infrared (IR), visible light, ultraviolet (UV), X-rays and gamma rays.

lower-energy radiation, such as radio waves, is expressed as frequency while microwaves, infrared, visible and UV light are usually expressed as wavelength and finally, higher-energy radiation such as X-rays and gamma rays, is expressed in terms of energy per photon.

Therefore, hydrogen lies between the ultra-violet, visible light and infra-red region of the electro magnetic spectrum.

5 0
3 years ago
9A. A sample of hydrogen at 1.56 atm had it's pressure decreased to 0.73
Jlenok [28]

Answer:idk

Explanation:

Idk

8 0
4 years ago
Which of the following would the kinetic theory address?
AURORKA [14]
I think it’s B vibrations in molecules
Explanation: The Kinetic Theory of Matter states that matter is composed of a large number of small particles—individual atoms or molecules—that are in constant motion.
5 0
3 years ago
The heat of fusion AH, of ethyl acetate (C4H802) is 10.5 kinol. Calculate the change in entropy as when 398. g of ethy, acetate
Hitman42 [59]

<u>Answer:</u> The entropy change of the ethyl acetate is 133. J/K

<u>Explanation:</u>

To calculate the number of moles, we use the equation:

\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}

Given mass of ethyl acetate = 398 g

Molar mass of ethyl acetate = 88.11 g/mol

Putting values in above equation, we get:

\text{Moles of ethyl acetate}=\frac{398g}{88.11g/mol}=4.52mol

To calculate the entropy change for different phase at same temperature, we use the equation:

\Delta S=n\times \frac{\Delta H_{fusion}}{T}

where,  

\Delta S = Entropy change  = ?

n = moles of ethyl acetate = 4.52 moles

\Delta H_{fusion} = enthalpy of fusion = 10.5 kJ/mol = 10500 J/mol   (Conversion factor:  1 kJ = 1000 J)

T = temperature of the system = 84.0^oC=[84+273]K=357K

Putting values in above equation, we get:

\Delta S=\frac{4.52mol\times 10500J/mol}{357K}\\\\\Delta S=132.9J/K

Hence, the entropy change of the ethyl acetate is 133. J/K

7 0
3 years ago
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