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kondaur [170]
3 years ago
14

Whenever anything moves, it has _____ energy. chemical heat mechanical

Chemistry
1 answer:
BaLLatris [955]3 years ago
5 0
Mechanical, because the other two make no sense and mechanical energy is the combination of kinetic and potential energy, or moving and still respectively.
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Only radioactive isotopes are useful for radiometric dating or medical diagnostic exams. Briefly explain why stable isotopes wou
Mnenie [13.5K]

Answer:

Explanation:

Isotopes are atoms of elements that have the same atomic number but different mass number hence ISOTOPY. Radioactive Isotopes on the other hand are unstable as they either undergo Alpha decay, beta decay or gamma decay compared to stable isotopes.

Radioactive elements decay at varyinf rates as such the rate of radioactive decay is used in the characterization of radioactive element and mostly expressed in terms of the half life of the radioactive elements.

Half life is the time taken for half of the total atoms of an elements to decay into half of its initial sizes. for example, the half life of radium-226 is 1622 years, it implies that if we have 1000000 radium atoms at the beginning, then at the end of 1622years, 500000 would have disintegrated. These phenomenon can never be experienced by stable isotopes as such they can not be used in carbon dating techniques. reason why uranium-238 is mostly and commonly used in the earth crust to estimate the ages of rocks because it has a half life of 4.5 x 10^9 years.

And also, the radioactive isotopes of most common light element are short, they have very short half life (few days or weeks) and they decay rapidly to vanshing point, as such, they are not found in nature to any reasonable extent.

8 0
3 years ago
The equation shown represents cellular respiration. Glucose + X → Y + Water + Energy What do X and Y most likely represent? X re
777dan777 [17]

Answer:

X represents oxygen and Y represents carbon dioxide.

Explanation:

Because in respiration, you consume oxygen and make carbon dioxide whereas, in photosynthesis, the equation is reversed and you use carbon dioxide and make oxygen and glucose.

4 0
3 years ago
SELECT ALL THAT APPLY. Which of the following statements about Charles's law are true?
Serjik [45]
A. Real gases may be expected to deviate from Charles's law at high pressures.

C. Real gases may be expected to deviate from Charles's law near the liquefaction temperature.
7 0
3 years ago
Read 2 more answers
2 A(g) + B(g) ---> 2 C(g)Rate = k [A][B]At the beginning of one trial of this reaction, [A] = 3.0 M and [B] = 1.0 M. The obse
Orlov [11]

Answer:

Lmol⁻¹s⁻¹

Explanation:

The rate law of the given reaction is:-

Rate=k[A][B]

Wherem, k is the rate constant.

Given that:-

Rate = 0.36 mol/Lsec = 0.36 M/sec

[A] = 3.0 M

[B] = 1.0 M

Thus,

Applying in the equation as:-

0.36 M/sec =k × 3.0 M× 1.0 M

k = 0.12 (Ms)⁻¹ = 0.12 Lmol⁻¹s⁻¹

<u>The units of k = Lmol⁻¹s⁻¹</u>

6 0
3 years ago
How many moles of sodium hydrogen carbonate are present in 2.61 grams of this compound?
Sloan [31]

Molar mass of NaHCO_3

  • 23+1+12+3(16)
  • 36+48
  • 84g/mol

Now

\\ \sf\longrightarrow No\:of\:moles=\dfrac{Given\:mass}{Molar\:mass}

\\ \sf\longrightarrow No\:of\; moles=\dfrac{2.61}{84}

\\ \sf\longrightarrow No\:of\:moles=0.0312mol

7 0
2 years ago
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